AtHeart Members (OT7)

Arin - AtHeart's Leader and Main Dancer

Arin's Profile and Background

Lee Arin serves as AtHeart's leader and stands out among atheart members with her strong dance foundation. Born on July 1, 2007 in Wonju, Gangwon, South Korea, she brings a performance-focused energy to the group. At 164 cm tall with blood type AB and an ISFJ personality type, her atheart profile reflects a methodical yet passionate approach to her craft.

Her educational background prepared her for the K-pop stage. On January 8, 2026, Arin graduated from Hanlim Multi Art School, where she studied in the practical dance department. This formal training reinforced the skills she had developed since childhood, when dance became her primary mode of expression.

Position as Leader and Main Dancer

Arin holds dual positions that define her contribution to atheart kpop activities. She was confirmed as the main dancer during an appearance on Idol DKDK Club on August 17, 2025. Subsequently, her leadership role was officially confirmed during an interview with THE BUZZ on November 12, 2025. Members consider her the performance leader due to her extensive dance experience, and she frequently develops choreography for the group.

During the 2026 comeback cycle, Arin took on a more prominent role, showcasing a significant image shift from the debut style. She gained attention for her sharp performance and charismatic presence in the music video, which introduced the group's "The New Black" branding. This evolution symbolized a more confident and mature direction for the entire ensemble.

Key Facts About Arin

Known by the nickname Ah-Rong, Arin carries a personal motto that reflects her approach to life: "Let's make the best of one life, we live and do everything we've wanted to do". Her favorite color is black, contrasting with her representative color of blue within the group. She owns a pet Maltese named Lee Bom, coincidentally sharing the same name as member Bome's birth name.

Her grandmother wanted to name her Bruce Lee (이소룡), adding an amusing family story to her atheart members profile. When it comes to food preferences, she loves Korean cuisine and has a particular fondness for croffles, chocolate muffins, and macaron shells. Shopping ranks among her favorite activities, especially collecting shoes and hats, and she enjoys visiting the Hangang River. An unexpected trait reveals she falls asleep immediately when her head hits the pillow. Her favorite characters include Crayon Shin-chan and Choi Jadoo from Hello Jadoo.

Arin's Journey to AtHeart

Originally, Arin dreamed of becoming a professional dancer because she felt dance was what she could showcase best. When she first received a casting call, she experienced considerable uncertainty about pursuing the idol path. Given that being an idol would provide the best platform to share her talents and connect with people, she decided to pursue the opportunity.

Her mother played a crucial role in this decision. Though not openly expressive with feelings, her mom consistently believed in and supported whatever Arin wanted to do. This encouragement became her primary motivation, and she aspires to invite her family to AtHeart's first concert.

The company cast her after she uploaded a video dancing to "MEOW" by MEOVV on Instagram. On February 19, 2025, Arin was officially revealed as the sixth atheart members name to be introduced to the public. During the music video shoot for their debut, she experienced a memorable wire scene simulating flying. Initially nervous beforehand, she enjoyed the actual filming and found it exhilarating. Sooyoung sunbaenim showed support, encouraging the group to continue their efforts with confidence that success would follow.

Michi - The Japanese-American Member

Michi's Profile and Background

Michi Yorkston represents a multicultural bridge within atheart members, bringing her Japanese-American heritage from Honolulu, Hawaii to the K-pop stage. Born on May 6, 2007, she stands at 174 cm tall and possesses an ENTJ personality type that drives her leadership qualities. Her Korean name, Kim Misook (김미숙), reflects her integration into Korean entertainment culture.

She completed her education at Mid Pacific Institute in Hawaii, where she balanced academic pursuits with her growing passion for performance. Her family includes parents and an older sister, providing a supportive foundation for her career. An unexpected addition to her household is her pet chicken named Airplane, showcasing her unique personality.

Michi's Role in AtHeart

Michi holds exceptional significance as the first atheart members name revealed through casting. During a global audition in Hawaii, Titan Content's founder Kang spotted her potential immediately. "When I saw her, I had that feeling that she was the one, and I can now finally start putting together a group around her," Kang told The Hollywood Reporter. This foundational role positioned her as the core around which the entire seven-member ensemble was built.

Her performance strengths stem from deep-rooted passion combined with technical confidence. She identifies her dedication and positive attitude as primary assets, stating her passion drives continuous improvement. Dancing ranks among her strongest skills, developed through years of practice that preceded her professional training. The company announced her as a member on July 16, 2024, marking the beginning of public anticipation for the group's formation.

Key Facts About Michi

Pink defines Michi's aesthetic preferences, serving as both her favorite color and representative color within the atheart profile system. Her representative emoji, a pink heart (🩷), further emphasizes this signature identity. She communicates fluently in English and Japanese while actively learning Korean, earning the nickname Kim Michi (김미치) among members for her rapid Korean language acquisition.

Her motto, "Never give up," encapsulates the determination that propelled her from amateur dance covers to professional debut. Musical inspiration flows from NewJeans and PinkPantheress, whose upbeat and groovy styles influence her artistic direction. Spring holds special appeal as her favorite season.

Creative pursuits extend beyond performance. Her hobbies encompass playing guitar, baking, gardening, pilates, and collecting accessories. She demonstrates artistic talent through drawing and expresses care for fellow members by baking banana bread and preparing spam musubi, a Hawaiian specialty. Practical skills include holding an American driver's license, distinguishing her among the atheart members age group.

Michi's Journey to AtHeart

Before professional training, Michi performed K-pop dance covers with friends at school, cultivating performance experience in an informal setting. This grassroots engagement with Korean pop culture laid groundwork for her eventual career path. When Titan Content held their global audition in Hawaii, she seized the opportunity that would transform her aspirations into reality.

Her perspective on the group's debut single "Plot Twist" reveals thoughtful artistic interpretation. She explained the track exemplifies what young people experience while figuring themselves out and navigating unexpected emotional confusion. The song's themes resonated personally as she prepared for debut. Looking toward 2026, she emphasizes the group's diverse backgrounds and personalities create a harmonious relationship that strengthens their musical output and public perception. She envisions showcasing each member's different specialties and talents to demonstrate their collective strength.

Katelyn - AtHeart's Filipino Member

Katelyn's Profile and Background

Katelyn Angela Ejercito Tan entered the atheart members lineup on November 12, 2024, when she was introduced alongside Seohyeon and Aurora. Born July 24, 2007 in Parañaque, Metro Manila, Philippines, she carries both Filipino and Chinese heritage, reflected in her Chinese name Chén Qírén (陈琪仁) and Korean name Choi Jiyeon (최지연). At 162 cm tall with an INFJ personality type, her atheart profile showcases a performer driven by authenticity and cultural connection.

Her upbringing shaped her multicultural perspective. She comes from a large family consisting of her parents, six siblings, and between 17 to 20 dogs, depending on recent additions. This vibrant household provided the foundation for her openness to different perspectives. Her father's side focuses on business while her mother's side works in entertainment, creating a natural duality in her worldview. She communicates fluently in English, Tagalog, and Korean, bridging language barriers within the group.

Katelyn's Role in AtHeart

Red defines Katelyn's visual identity within atheart kpop activities, serving as her representative color with a red heart emoji (❤️) as her signature symbol. Known by the nickname Keke (케케), she has established herself as the group's trend leader due to her passion for fashion. She gravitates toward comfortable street fashion suitable for dancing, balancing style with functionality.

Her strength as a performer stems from positive energy and an enthusiasm for challenges. She picks up new skills quickly when focused with a clear mindset, applying full effort to build proper techniques in both dance and vocals. Specifically, this dedication manifests in her willingness to learn and adapt across different performance styles. Purple ranks as her favorite color, contrasting with her official representative shade.

Key Facts About Katelyn

Katelyn's personal motto, "She believed she could, so she did," encapsulates her determination and self-belief. Her diverse hobbies include boxing, watching movies, riding horses, crocheting, and ice skating. After watching the anime Haikyuu!!, she developed an interest in volleyball, demonstrating how entertainment influences her recreational choices. She enjoys reading books and considers her smile or eyes her most charming features.

BTS stands as one of her biggest inspirations, influencing her decision to pursue an idol career. She maintains a friendship with Gehlee from UNIS, connecting with fellow Filipino artists in the industry. Her wishlist reveals ambitious goals: skydiving, learning horseback riding and skiing, watching a hockey game, achieving a sold-out concert, visiting her hometown with members, and performing at the Philippines' Philippine Arena.

Katelyn's Journey to AtHeart

Before discovering K-pop, Katelyn maintained a rigorous schedule with school from 7 a.m. to 4 p.m. and tutoring from 5 p.m. to 9 p.m., leaving little time for performance pursuits. On this occasion, her older sister's friend showed her BTS videos the day before "Butter" was released, awakening a hidden dream. As a result, she ran to her mother in tears, expressing her desire to become a K-pop star. With her mother's side of the family involved in showbiz, performing felt inherent to her identity.

She was cast at the Manila global audition, where evaluators recognized her great talent and vibrant energy. One of the songs she performed during her audition was "Celebrity" by IU. Working with Katie, who possesses extensive K-pop industry experience, provided comfort and confidence during the group's formation. Katie attended projects and photo shoots despite her busy schedule, supporting the members through every "first". Subsequently, when Sooyoung from Girls' Generation appeared in their music video teaser, Katelyn felt so nervous she could barely speak, frozen by the surreal experience of meeting her role model. She hopes audiences recognize that the atheart members profile they see on camera reflects their authentic selves in real life.

Bome - AtHeart's Main Vocalist

Bome's Profile and Background

Lee Bom, professionally known as Bome, brings powerful vocal capabilities to the atheart members roster. Her stage name carries special meaning in Korean, translating to "spring". Born on November 26, 2007 in Geochang, Gyeongsangnam-do, South Korea, she stands at 166 cm tall with blood type B and an ISFJ personality type. Her family consists of her parents and an older sister who played a pivotal role in shaping her musical tastes.

She graduated from School of Performing Arts Seoul (SOPA) in the practical music department, receiving formal training that complemented her natural abilities. Previously, she trained at Mudoctor Academy before joining Titan Content. Her educational background included numerous awards in drawing, designing, singing, and reading, showcasing her diverse talents.

Position as Main Vocalist

Bome was confirmed as the main vocalist during AtHeart's 'Plot Twist' Debut Showcase on August 13, 2025. Her biggest strength lies in her powerful vocals, which allow her to adapt across various genres. She loves experimenting with different tones rather than limiting herself to a single vocal style. This versatility enables her to adjust her voice to different musical directions, a quality she takes particular pride in.

Her favorite track from the debut EP is "Dot dot dot…," the third song on the album. She feels the R&B genre suits AtHeart well and believes the track showcases the true voice of each member authentically. The song's intensity caught her attention from the intro, allowing her to display her vocal color in a way that felt genuine.

Key Facts About Bome

Known by the nickname BomBom (봄봄), Bome lives by the motto "One good deed a day". Her favorite colors are neutral tones, while black serves as her representative color within the atheart profile. She owns several unique interests, including her love for capybaras and her favorite Sanrio character, Badtz-Maru.

Her hobbies encompass drawing, designing, singing, watching animated movies, and reading. An unexpected charm is her expertise with memes, and she demonstrates skill at doing impressions. She dislikes mint chocolate and tomatoes. Before pursuing an idol career, she wanted to become an SFX makeup artist. Her favorite ice cream flavor is vanilla, and she is a fan of STAYC.

Bome's Journey to AtHeart

Performance became ingrained in Bome's life during elementary school when she joined the choir. She continued performing throughout middle school and high school as a band member. Each time she performed, the crowd's energy and applause made her feel alive. Seeing how idols perform together and create amazing stages inspired her to pursue the same path.

Her older sister, with whom she has a large age gap, introduced her to K-pop at a young age. As a result, they would watch performances and listen to songs by 2NE1 and Taeyeon from SNSD together. These moments fueled her dream of becoming an artist who inspires others.

Titan Content cast her through a direct message after discovering a video of her singing "I still love you a lot" by Baek Jiyoung. During her audition, she performed "Dangerously" by Charlie Puth. On February 19, 2025, she was unveiled alongside Arin and Nahyun as part of the seven-member lineup.

Seohyeon - The Rising Performer

Seohyeon's Profile and Background

Moon Seohyeon joined the atheart members lineup at age 16 when she was revealed on November 12, 2024 alongside Katelyn and Aurora. Born September 12, 2008 in Taean, Chungcheong Province, South Korea, she is now 17 years old and stands at 162 cm tall with blood type B. Her ISTP personality type reflects her practical and observant nature. She currently attends the School of Performing Arts Seoul (SOPA) in the theater and film department, balancing academic studies with intensive performance training.

Her family includes her parents and a younger brother who support her career pursuits. Purple dominates her aesthetic preferences, serving as both her favorite color and representative color within the atheart profile system, marked by a purple heart emoji (💜) as her signature symbol. Members affectionately call her by the nickname "Elementary school kid" (초딩), highlighting her youthful energy within the group.

Seohyeon's Role in AtHeart

Seohyeon stands out with her captivating vocal tone and diverse range of exceptional talents. Her biggest strength as a performer lies in the atmosphere she creates and her charm, which she describes as having a strong, sophisticated vibe combined with an appeal that makes people want to keep watching. She focuses on bringing unique expressions to each performance, wanting to use her vibe and charm not only to achieve great results but also to inspire and give confidence to others.

Before debut, she expressed how the entire process felt surreal, noting that during training all she could focus on was practicing, recording and choreography, often skipping other activities. Her dedication to continuous vocal and dance practice prepared her for the debut she eagerly anticipated.

Key Facts About Seohyeon

Her personal motto, "No doubt, everything will work out," reflects her optimistic outlook. She carries an unexpected habit of bringing buldak sauce everywhere because she loves spicy foods and particularly enjoys meat and buldak noodles. Her hobbies include collecting cute dolls, keyrings, and stickers, and she demonstrates surprising skill at playing claw machines.

Musical inspiration flows from TWICE and BLACKPINK, whose diverse song styles influenced her approach to matching expressions and outfits to different music vibes. She is also a fan of IU. Whereas she loves looking at the ocean, she is afraid of riding rollercoasters, revealing a contrast in her adventurous spirit.

Seohyeon's Journey to AtHeart

Dance became central to Seohyeon's identity when she was about five years old, though she never told anyone about her idol dreams during elementary school. She simply told her parents she loved dancing and singing, keeping her aspirations private. She started learning street dance at a dance academy during elementary school, and as she participated in more competitions and performances, she gained more opportunities to be on stage.

The excitement of getting attention while performing and hearing people clap afterward made her realize how much she wanted to be an idol and how serious she was about that dream. Watching K-pop idols on music shows captivated her because they seemed to have so much fun on stage, prompting her to think, "I want to do that too". Subsequently, she applies those childhood experiences by thinking creatively about expressing herself uniquely for each song, focusing on what she can bring to performances in her own creative way.

Aurora - AtHeart's Japanese Member

Aurora's Profile and Background

Aurora returned to active atheart members activities in 2026 after recovering from health-related challenges that temporarily sidelined her career. Born on July 4, 2009 in Sumida-ku, Tokyo, Japan, she is now 16 years old. Her ENFP personality type reflects the bright, positive, and loving energy that defines her presence within the group. Orange serves as her representative color, matched with an orange heart emoji (🧡) as her signature symbol.

Linguistic abilities distinguish her atheart profile among international members. She started studying Korean at age 7 and communicates fluently in Japanese and English as well. This trilingual capability strengthens the group's global appeal alongside Michi and Katelyn. Her charm point is the distinctive mole next to her eye.

Aurora's Role in AtHeart

Her vocal capabilities center on a clear and refreshing husky voice that creates a unique contrast in tone. This distinctive quality became one of her defining strengths as a performer, allowing her to stand out vocally within atheart kpop arrangements. She possesses incredible vocal and dance skills that complement her positive energy.

On July 2, 2025, the announcement came that Aurora would take a hiatus due to health-related reasons. Subsequently, she had limited participation in the group's debut EP released in August 2025. Her return was revealed on June 15, 2026 through the "Say It" MV Teaser 1, marking her comeback to full promotional activities.

Key Facts About Aurora

Members affectionately call her by the nicknames Auchan (아우짱) and Tomato Princess, the latter referencing her love for tomatoes. White ranks as her favorite color, whereas orange represents her official group identity. Her older brother influenced her musical journey significantly, and she recalls singing with him and her mother as he played guitar during childhood. She draws inspiration from BTS, BLACKPINK, and Olivia Rodrigo.

Her motto, "The more the rice grain ripens, the lower its head bows," reflects her humble nature despite her talents. Her wishlist includes eating yakiniku in Japan, playing werewolf games on family vacation, going on a date with her mother, reuniting with school friends and teachers, completing a world tour, and seeing the aurora borealis in Iceland with members.

Aurora's Journey to AtHeart

Aurora discovered her love for K-pop at age 5 after attending a KARA concert. She began her performing career in acting at the same age. By age 12, her passion for K-pop deepened, prompting her to pursue the industry seriously through auditions. Music became her safe place, providing comfort whenever she felt down.

Nahyun - AtHeart's Maknae

Nahyun's Profile and Background

Kim Nahyun completes the atheart members lineup as the youngest member of the group. Born on September 3, 2009 in Cheongju, South Korea, she stands at 172 cm tall with blood type A and an ISTP personality type. Yellow defines her visual identity as her representative color, paired with a yellow heart emoji (💛) as her signature symbol. Her family consists of her parents and three younger sisters, creating a household where she holds the eldest sibling position despite being the maknae within atheart kpop activities.

She currently attends Hanlim Multi Arts School, balancing academic responsibilities with her professional commitments. Before joining Titan Content, she trained at SM Entertainment, gaining valuable experience that prepared her for debut.

Position as Maknae

Nahyun holds the maknae position within the atheart profile system, representing the youngest member born in 2009. She was unveiled on February 21, 2025 alongside Arin and Bome as part of the final member reveals. Notably, she identifies her biggest strength as the energy and performance she brings to the stage, focusing on delivering emotion in every moment through expressions and movements that tell a story.

Key Facts About Nahyun

Members call her by the nickname HamKick (햄킥이) owing to her favorite emoticon being a kicking hamster. Her motto, "Don't be negative and always smile," reflects her optimistic approach. Blue ranks as her favorite color, contrasting with her official yellow representative shade. She demonstrates an unexpected charm through her love for snacks and trying new varieties, with mychew being her favorite candy. Among all atheart members, she cries the easiest. Her hobbies include watching kitten videos, and she is a big fan of Hello Kitty.

Nahyun's Journey to AtHeart

Being an idol was her ultimate dream since childhood. Jang Wonyoung of IVE serves as her biggest influence, having inspired her since Produce 48 when Nahyun even cast a vote for her. Wonyoung's passion and persistence motivated her throughout trainee days. Her favorite track from the debut album is "Push Back," which she feels captures the emotional state of teenagers and that feeling of being pushed and pulled. The Amapiano genre makes the song special and perfectly suited for summer.

FAQs

Fans seeking to connect with atheart kpop activities will find the official fandom name is Heartbeat (핫빛). This designation represents the dedicated supporters who have followed the group since member reveals began in July 2024.

Where can fans follow AtHeart? The group maintains active presence across multiple platforms. Official accounts include their website atheart.me, Instagram @atheart.titan, X (formerly Twitter) @atheart_titan, TikTok @atheart.titan, and YouTube channel AtHeart_TITAN. For Asian markets, they operate on Weibo @AtHeart_Official, Douyin AtHeart_Official, BiliBili AtHeart_TITAN, and Xiaohongshu AtHeart_TITAN. Music streaming includes Spotify, Apple Music, Deezer, and Korean platforms Melon, Bugs!, Genie, FLO, Vibe, and Fromm.

What do atheart members say to fans? The group expresses gratitude toward Heartbeat for their unwavering support. Members acknowledge that fan encouragement provides the energy needed to grow stronger and continue improving. Particularly, they emphasize their commitment to showing many different sides of themselves while working hard to bring comfort and happiness to supporters. Katelyn specifically hopes audiences recognize that the atheart members profile they present on camera reflects their authentic personalities in real life.