Her nickname is "Baby cat".

She's 158cm.

She was born in Incheon, South Korea.

She was a contestant on the survival show My Teenage Girl and got scouted by 143 Ent thanks to it.

She was a member of LIMELIGHT with MiU and Gaeun.

She used to be a SM and PocketDol trainee.

She's a vocal student at IB Music Academy, where her trainer is Rolling Quartz’s Jayoung.

She thinks her three main attractive points are: her eye smile, her timbre and sometimes her wackiness.

She went viral for her pink and blonde hair during MADELEINE era.

She had pink hair for almost the entire time she was in LIMELIGHT.

Some of her role models are IU, OH MY GIRL and Taeyeon.

Her nicknames are "Mu" because it sounds like her favorite Pokémon, Mew and "baby tiger".

She's 164cm.

She was born in Tokyo, Japan.

She was a contestant on the survival show Girls Planet 999 with Mashiro and Yeseo. She signed with 143 Ent because of them.

She was a member of LIMELIGHT with Suhye and Gaeun.

She's a brand ambassador for hadakara (with Mashiro).

She used to be a model in Japan. In 2018, she became a model for Popstar magazine after winning the 'Tokyo Girls Audition 2018 Popteen Award', 'Up Plus Award' and 'Abema TV Award'. She appeared in Japanese music videos and magazines.

She starred on Onestar's On A Rainy Night MV (he was a Girls Planet 999 mentor).

She has a vlog series.

Her role model is IU.

She has song writing credits on the Japanese version of her solo song, TWENTY TWENTY.

She designed LIMELIGHT's lightstick.

Her nicknames are "Dumpling cheeks" and "Euna".

She's 165cm, which makes her the tallest in MADEIN.

She was born in Gyeonggi-do, South Korea.

She's the only member who didn't participate in a survival show.

She was a member of LIMELIGHT with Suhye and MiU, and she used to be the maknae.

She was scouted by 143 Ent on Yeseo's recommendation since they were schoolmates at Lila Arts School.

She trained under YGX (Street Dance Fighter)'s Dowoo for 2 years.

Her favorite dance style is strong hip hop.

She featured in BOBBY (iKon)'s "Drowning" on music show stages.

Her role model is Jennie.

Her nicknames are "Rina" and "Serinyan".

She's 164cm.

She was born in Osaka, Japan.

She was on the survival show PRODUCE 101 JAPAN with Nagomi.

She used to train at JOY DANCE JAPAN.

She's a big fan of Yena, with whom she had 3 fancalls, and she even met IZ*ONE at a fansign. She got noticed by her on PD 101 JAPAN.

She joined 143 Ent because she heard UNO at a meeting and liked it a lot.

Her nicknames are "Shiro" and "Marshmallow".

She's 157cm.

She was born in Tokyo, Japan.

She was a contestant on the survival show Girls Planet 999 with Yeseo and MiU, she placed 8th and debuted in Kep1er (2022-2024).

She's a brand ambassador for hadakara (with MiU) and PEACH C, and she collabed with Bellygom.

She's a songwriter, she wrote TIMELINE and some Kep1er songs: Straight Line, Don't lose your smile and Curious.

She got level 6 (highest level) for TOPIK (Korean proficiency test). She's so fluent in Korean that people think she's from Korea, and she speaks Korean even with Japanese people.

She was a JYP trainee for 2 years. She ranked 2nd at their open audition and became a candidate member of ITZY. She also appeared on Stray Kids' predebut show.

She's a cat lover.

She's very close with KISS OF LIFE's Natty as they used to share a dorm predebut and were rumored to debut together at some point.

Yeseo and Mashiro see each other as real life sisters.

Her nickname is "Bunny ace".

She's 157cm.

She was born in Incheon, South Korea.

She was a contestant on the survival show Girls Planet 999 with Mashiro and MiU, she placed 6th and debuted in Kep1er (2022-2024). She used to be the maknae of the group.

She's also a former member of Busters (2019-2020).

She used to be a member of a kids' music group, CutieL (2010-2013), and a child actress.

She's been active in the entertainment industry since she was 5 years old. She technically debuted in 2nd and 4th gen, and she'll debut with MADEIN in 5th gen as well.

She's studying real estate to help people avoid scams.

She got into Dongguk University, which has 7.3% acceptance rate, in the theatre department.

She's also an artist and she designed Kep1er's representative plushies.

She can play the piano.

Her and Gaeun used to be schoolmates at Lila Arts School.

Yeseo and Mashiro see each other as real life sisters.

Nako (former IZ*ONE) voted for her when she was competing on Girls Planet 999.