Billlie Members (OT7)

7 Billlie Members: Profiles, Ages & Fun Facts

Billlie members have captivated K-pop fans with their unique storytelling concept, blending mysterious narratives with experimental music since their debut on November 10, 2021. The seven-member girl group under Mystic Story Entertainment consists of Moon Sua, Suhyeon, Haram, Tsuki, Sheon, Siyoon, and Haruna.

Moon Sua - Main Rapper & Lead Vocalist

Basic Profile Information

Moon Sua stands as the first revealed member among Billlie members, announced on September 28, 2021. Born on September 9, 1999, in Cheongju, Chungbuk Province, she turned 26 years old in 2026. Her birth name carries meaningful hanja characters: 秀 (elegant or graceful) and 雅 (elegant).

She is the only Korean member of the group who doesn't have the surname 'Kim'. Her family includes her late older brother, Moonbin, who was a member of ASTRO. Moon Sua attended Seowon Middle School and graduated from Hanlim Multi Art School in Applied Music.

Career Journey & Achievements

Moon Sua's journey in K-pop spans over 12 years of training, ranking among the longest training periods in K-pop history. She joined YG Entertainment in 2009 at age 10. During her time there, she appeared in GD & TOP's 'Knock Out' music video in 2011. In 2012, YG Entertainment released plans to debut a 'Future 2NE1' with Moon Sua taking CL's role as the rapper, though the project was canceled.

Her breakthrough came in 2015 when she participated in Unpretty Rapstar 2, finishing as the third runner-up and becoming the youngest contestant in the show's history. She sang Elle Varner's 'Only Wanna Give It To You' for her audition and produced tracks including the MIXNINE title track 'Come Over'.

After 10 years, she left YG Entertainment in 2019. In 2020, she joined Mystic Story's rookie development program, Mystic Rookies. Moon Sua debuted with Billlie on November 10, 2021, contributing to their extended play The Billage of Perception: Chapter One by co-writing the lead single 'Ring X Ring'.

From August through November 2022, she competed in JTBC's The Second World, where female idol rappers showcased their vocal abilities, finishing 5th overall. In December 2022, she released the OST 'Like a Star' for JTBC's drama Reborn Rich. Additionally, she served as Show Champion MC alongside Tsuki and woo!ah!'s Nana from February 8 to November 15, 2023.

On April 7, 2025, she debuted in Billlie's first sub-unit Moon Sua X Siyoon. Her career experienced interruptions with a hiatus following her brother's passing in April 2023 and another for health concerns starting September 12, 2023. She returned to activities on April 12, 2024.

Personality Traits & Fun Facts

Moon Sua describes her personality as 'simple and a little cold'. Her hobbies include doing nail art, taking pictures, and watching Netflix. She loves retro fashion and embraces that style in her clothing choices. Her Indian dimple serves as her signature charm.

Her role models are former 2NE1 member CL and former 9MUSES member Euaerin. She follows the life motto: 'There's a time for everything'. Among Billlie's lore characters, she prefers Snowy Man over Dreamvader. Her favorite Billlie song is 'The Eleventh Day'.

Moon Sua treasures a polaroid book filled with photos of Billlie members taken before their debut. She enjoys meat, her mother's homecooking, and seaweed soup, while her favorite ice cream flavors include vanilla and salted caramel. Spider-Man ranks as her preferred superhero. She shares a dorm room with Haram and Suhyeon. Despite her cool stage presence, she admits to being scared of ghosts.

Suhyeon - Main Vocalist & Lead Dancer

Basic Profile Information

Suhyeon was revealed as the fourth member of Billlie members on October 4, 2021, bringing with her a background in both music competitions and acting. Born Kim Su-hyun on January 15, 2000, in Bisan-dong, Seo-gu, Daegu, South Korea, she turned 26 years old in 2026. The hanja characters in her name translate to 秀 (elegant or graceful) and 炫 (to dazzle or show off).

Suhyeon has a brother and grew up dreaming of becoming a swimming coach before watching Girls' Generation performances inspired her to pursue a K-pop idol career. She attended Sillim High School.

Career Journey & Achievements

Suhyeon's path to debut spans a decade of persistence through multiple opportunities. She joined MYSTIC Story in 2014, becoming the company's first trainee and training for 7 years before her official debut. In 2016, she participated in Mnet's survival show Produce 101, representing MYSTIC Story, where she was eliminated in episode 5 after ranking 69th place. Following the 2019 vote manipulation investigation, authorities revealed that Suhyeon was one of two Season 1 contestants victimized by vote manipulation, with her actual votes being higher than presented, leading to her unfair elimination.

Subsequently, in October 2017, she became a contestant on JTBC's survival show MIXNINE, making it to the final episode but was eliminated when the boys' team won against the girls' team, finishing at rank 17. That same year, she made her acting debut in the drama Girls' Generation 1979, playing the supporting role of Kim Ki-ryeo. In 2018, Suhyeon booked her most notable acting role as Yeo Bo-ram, a main character in the Naver series A-Teen.

On June 29, 2019, she debuted as a soloist with her digital single "Around The World," with the music video showcasing her A-Teen character. She also appeared in SEVENTEEN's "Chocolate" music video. On February 18, 2020, MYSTIC Story officially revealed her as a member of the trainee group MYSTIC Rookies.

Suhyeon debuted with Billlie on November 10, 2021, with their first mini album The Billage of Perception: Chapter One. She has contributed to 6 songwriting credits across Billlie's discography. On June 15, 2023, MYSTIC Story announced her indefinite hiatus due to health reasons. Following nearly ten months away, she officially returned to group activities on April 12, 2024, alongside Moon Sua.

Personality Traits & Fun Facts

Suhyeon's charm lies in the contrast between her on-stage and off-stage presence. Her MBTI type is currently INFJ, though she has previously tested as ESFJ, ENFP, and INFP. She follows the life motto: "Work when you work, play when you play".

Her hobbies include making beaded jewelry and eating, with ice cream being her absolute favorite food. She participated in creating the SM C&C lip tint line called "Teen't" in April 2021. Among ice cream flavors, she favors chocolate, green tea, and Earl Gray. Suhyeon specializes in smiling with her eyes and tends to sleep talk frequently.

IU serves as her role model, while Spider-Man and Doctor Strange rank as her favorite superheroes. Her favorite Billlie song is "Ring x Ring". She would choose classic vanilla as an ice cream flavor that resembles her personality. If she could live as another Billlie member for a day, she would choose Haram because of her voice. She shares a dorm room with Haram and Moon Sua. Suhyeon is friends with APRIL's member Naeun. Her favorite flower is ranunculus.

Haram - Main Vocalist

Basic Profile Information

Haram's journey to becoming one of the Billlie members began with a significant achievement in 2017 when she won the Star Award at SM Entertainment's 'genie x everysing Battle Singer' audition contest, receiving vocal lessons from SM as her prize. Born Kim Ha-ram on January 13, 2001, in Jeonju, Jeollabuk-do, South Korea, she reached 25 years old in 2026.

Her family includes an older sister named Kim Ye-ram who works as a model, while her father pursues a career as a chef. Haram graduated from Jungwon High School and currently attends Dong-A University of Broadcasting and Arts, majoring in Broadcasting and Entertainment.

Career Journey & Achievements

Haram's path to debut features multiple contest experiences. Initially, she entered the 2017 'genie x everysing Battle Singer' audition with a cover of Rain by Girls' Generation's Taeyeon, receiving the fourth most audience votes overall. The contest structure included four prizes determined by various voting methods, and she secured the Star Award, which was decided entirely by the panel of SM judges.

In 2019, she participated in another everysing contest where entrants performed duets with prerecorded videos of EXO's Chen, choosing to sing Everytime by Britney Spears. Subsequently, she attended MUDOCTOR Audition Training Academy, a bootcamp program designed to prepare trainees for company auditions. She passed the final round of MYSTIC Story auditions and joined as a trainee in April 2019, as confirmed by MUDOCTOR's Instagram.

Three months later, on July 8, she made her first appearance as a MYSTIC trainee through her own LISTEN STAGE. On February 18, 2020, MYSTIC Story officially revealed her as a member of MYSTIC Rookies. She was confirmed as the sixth and final member of Billlie on October 6, 2021, making her official debut with the group on November 10 with their first mini album the Billage of perception : chapter one.

Her career expanded beyond group activities with several OST releases. On November 16, 2022, she featured alongside LUCY's Shin Gwang Il on the track 'Still in you' for Disney+ reality dating show PINK LIE Part 2 OST. On March 26, 2023, she contributed to the Lord of Heroes turn-based RPG OST with 'Remember the days'. Additionally, on August 2, 2023, she released 'The Moon' for the sci-fi disaster film of the same name.

Personality Traits & Fun Facts

Haram identifies her big eyes, husky voice, and easy-going personality as her primary charms. Her distinctive deep and resonant voice sets her apart as a vocalist. She follows the motto 'let's be thankful'. Her hobbies include reading books and watching soccer games.

As a trainee for roughly a year before debut, she gained visibility through appearances on the Korean YouTube show JeAlalala. She admires American singer Ariana Grande and counts Girls' Generation member Taeyeon among her biases, being a fan of SNSD. Her favorite Billlie song is "GingaMingaYo (the strange world)".

According to fellow members, Haram is most likely to stay up late and keep a secret. She expresses a desire to experience countryside life, wanting to live like Tsuki for a day. In truth, she would prefer Suhyeon's acting skills if she could gain another member's ability. Her Instagram account @harami_beam has attracted more than 160,000 followers.

Tsuki Billlie - Main Dancer & Sub-Vocalist

Basic Profile Information

Tsuki brings a distinctly international flavor to the Billlie members roster as one of two Japanese members. Born Fukutomi Tsuki on September 21, 2002, in Yodogawa-ku, Osaka, Japan, she reached 23 years old in 2026. Her name translates to 'moon' in Japanese, establishing her lunar theme that carries through her representative emoji and logo.

She graduated from Renaissance Osaka High School and moved to Korea when she was 14 years old to pursue her idol aspirations. Her fandom name is Tarutaru.

Career Journey & Achievements

Tsuki's path through the K-pop industry spans multiple entertainment companies. She participated in JYP's 15th Audition before becoming an SM Entertainment trainee in early 2016 at age 15. During her time at SM, she trained under the stage name Ravi. After two years, worsening mental health led her to leave the trainee program and return to Japan in 2018.

Her career took an unexpected turn when she competed in the third season of "Popteen Cover Girl War" alongside fellow Billlie member Siyoon. She placed first among the 10 finalists, earning an exclusive modeling contract with Popteen magazine starting in November 2019.

Subsequently, she joined MYSTIC Story in 2019 and was officially introduced as part of Mystic Rookies on February 19, 2020. On November 25, 2020, she debuted as a member of MAGICOUR from the Japanese girl group 7+ME LINK, using the stage name TARU. However, she graduated from the group in December 2020 to focus on her Korean activities.

On September 30, 2021, Tsuki was confirmed as the second member of Billlie, making her official debut with the group on November 10, 2021, through their mini album "The Billage of Perception: Chapter One".

Her role as an MC on MBC's "Show Champion" began on February 8, 2023, running until November 15, 2023. In 2023, she participated in the Netflix semi-reality show "Zombieverse," which premiered on August 8, 2023. She returned for its second season, "Zombieverse: New Blood," which aired on November 19, 2024. On March 24, 2023, her Japanese K-pop radio show "Tsuki ENT.VIEW" was announced, beginning broadcasts on April 8, 2023. In May 2025, she became the MC of Workdol season 4.

Personality Traits & Fun Facts

Tsuki began learning dance at the age of 4. She worked at Shake Shack during her time in Japan. Her role within Billlie includes serving as the bright dance teacher and Japanese teacher.

BOA and Girls' Generation serve as her role models, with "Into the New World" by Girls' Generation being the song she sang for her audition. In particular, she is close friends with aespa's Ningning from their shared time as SM Entertainment trainees, as well as H1-KEY's Yel.

Her hobbies encompass watching cartoons, drawing, painting, and playing games. She can mimic the sound of an elk, though MYSTIC has since restricted her from performing this impression. She can also impersonate Japanese subway announcements. On the other hand, she is extremely forgetful and often leaves things behind. She sleep talks in both Korean and Japanese.

Her life motto reflects her approach to growth: "Don't try to do better than others. Let's try to do better today". She shares a dorm room with Sheon, Siyoon, and Haruna. Members describe her personality as unique and energizing. Her favorite singers include BLACKPINK, TWICE, and Aimyon, with BLACKPINK's Jisoo and SHINee's Minho being her specific biases.

Sheon - Main Dancer & Lead Rapper

Basic Profile Information

Sheon holds a unique distinction among Billlie members as the only one who performs under a stage name rather than her birth name. Born Kim Suyeon on January 28, 2003, in Yeonsu-gu, Incheon, South Korea, she reached 23 years old in 2026. The stage name was adopted specifically to prevent confusion with fellow member Kim Suhyeon. The hanja characters in her stage name translate to 秀 (elegant or graceful) and 娟 (beautiful).

She graduated from Hanlim Multi Art School on February 11, 2022, where she studied in the Department of Applied Music. Currently, she attends Dongduk Women's University College of Performing Arts.

Career Journey & Achievements

Sheon's path to joining Billlie members involved multiple entertainment companies and a high-profile survival show. She initially trained at A Team Entertainment, where she was part of the pre-debut lineup for bugAboo. After leaving when their debut was postponed, she became a MYSTIC Story trainee on March 21, 2021.

In August 2021, she competed on Mnet's survival show Girls Planet 999, representing MYSTIC Story. She ranked 10th place overall in the finale episode, missing the final Kep1er lineup by just one position. Surprisingly, she debuted before Kep1er despite her elimination, becoming the first Girls Planet 999 contestant without prior group membership to achieve an official debut.

On November 19, 2021, MYSTIC Story confirmed Sheon would join Billlie. Her debut performance with the group took place on the November 27 broadcast of Show! Music Core. Beyond her idol activities, she has studied music composition and lyric writing, contributing to her artistic development.

Personality Traits & Fun Facts

Before gaining recognition as a trainee, Sheon built an online following for providing makeup advice, with a particular focus on eye makeup techniques. Her specialties include dance and makeup application. As a child, she dreamed of becoming a guitarist, and she can play both piano and guitar.

Her hobbies include watching zombie movies and browsing cat pictures. She excels at making animal noises, specifically imitating beavers, elks, and pterosaurs. Her flexibility and tumbling skills frequently appear in her dance covers. She describes herself as the 'sloth' of Billlie.

Sheon is close friends with Kep1er's Hikaru and Lapillus's Shana. Her favorite song is "She Is" by Jonghyun, whereas her preferred Billlie track is "a sign ~ anonymous". She shares a dorm room with Tsuki, Siyoon, and Haruna. She has allergies to apples and cherries and enjoys bubble tea and video games.

Siyoon - Main Rapper & Lead Dancer

Basic Profile Information

Standing at 173 cm, Siyoon holds the record as the tallest among Billlie members. Born Kim Si-yoon on February 16, 2005, in Geumcheon-gu, Seoul, South Korea, she reached 21 years old in 2026. Her hometown is Gwangmyeong, Gyeonggi-do. The hanja characters in her name translate to 詩 (poetry or verse) and 允 (just or fair).

Her personal fandom name is Unicity, with a logo featuring a chick popping out of an egg.

Career Journey & Achievements

Prior to joining MYSTIC Story, Siyoon trained at DEF Dance Skool and Millennium Dance Academy. In 2015, she appeared in an NBC News article about aspiring K-pop trainees. She also featured in BOYFRIEND's 'Love Style' teaser. Passing her audition in April 2019, she sang a Heize song despite being extremely nervous. In total, she trained for approximately 5 years.

In October 2019, Siyoon competed alongside Tsuki in Popteen's third season 'Cover Girl War' competition, placing sixth among 10 finalists. This led to her becoming a regular model for the Japanese teen fashion magazine starting November 2019.

She was officially revealed as a MYSTIC Rookies member on February 18, 2020. On September 30, 2021, she was announced as Billlie's third member, debuting on November 10, 2021. She has contributed to 17 songwriting credits across Billlie's discography. On April 7, 2025, she debuted in the sub-unit Moon Sua X Siyoon.

Personality Traits & Fun Facts

Siyoon's MBTI type is INFP, and she describes her personality as positive and bright. Her role models are IU and BLACKPINK's Lisa. She follows the motto: "It will work out/ I can do it". Among Billlie members, she cries the easiest.

Her hobbies include speaking Japanese with Haruna and writing in her diary. She practiced crow sounds to communicate with them as a child on account of many crows living near her home. She is close with Tsuki and shares a dorm room with her, Sheon, and Haruna. Many netizens compare her appearance to Weki Meki's Doyeon. Her favorite Billlie song is 'Everybody's Got a $ecret'.

Haruna - Lead Vocalist & Maknae

Basic Profile Information

Completing the Billlie members lineup as the maknae, Haruna brings her Japanese heritage and dance expertise to the group. Born Osato Haruna on January 30, 2006, in Kishiwada, Osaka, Japan, she reached 20 years old in 2026. As an only child, she attended Renaissance Osaka High School before pursuing her K-pop career.

She stands out as the only left-handed member in Billlie.

Career Journey & Achievements

Haruna's dance journey began with GPstudio dance academy, where she performed at Fashion Leaders fashion shows throughout 2018 and 2019. In September 2020, she appeared alongside Tsuki on the Japanese variety show 'Matsuko Kaigi'. Impressed by her dancing abilities, Mystic Story offered her a contract in late 2020.

She joined Mystic Story Entertainment in 2021 and was revealed as Billlie's fifth member on October 5, 2021. Her official debut occurred on November 10, 2021. Her audition featured the song 'Nijiiro' by Ayaka.

On July 25, 2025, Mystic Story announced Haruna's hiatus following an incident where an intruder broke into her residence. She returned to full activities on August 23, 2025.

Personality Traits & Fun Facts

Haruna's hobbies include watching movies, swimming, and artistic swimming. Red Velvet's Seulgi serves as her role model. She follows the motto: 'I'll do it until I can'. Her distinctive charm is the mole beneath her eye.

Her favorite season is winter, whereas red ranks as her preferred color. Among Korean cuisine, Rose Jjimdak holds her top spot. She would choose to live like Haram for a day to experience her pretty voice. Her favorite Billlie song is 'Overlap (1/1)'. She shares a dorm room with Tsuki, Sheon, and Siyoon.