- Fans have noted that Sooin resembles Bae Suzy (MissA) and LE SSERAFIM's Kazuha.
- She attended the School of Performing Arts Seoul (SOPA).
- Her MBTI personality type is ENFP.
- For her audition at The Black Label, she performed Little Mix’s "Oops."
- Her nickname is Swim Kim.
- Sooin’s favorite season is summer.
- She has an older sister.
- Her favorite number is 7.

- Fans pointed out her striking resemblance to F(X)'s Krystal Jung and actress Park Minyoung.
- Her MBTI personality type is INTJ.
- She was previously a trainee under YG Entertainment.
- Her audition song for The Black Label was Jorja Smith’s "Teenage Fantasy."
- Ga-won is friends with KISS OF LIFE’s Julie; they trained together at THEBLACKLABEL.

- Before her debut, Anna was an exclusive model for Seventeen Japan from October 2019 to December 2021, showcasing her elegance and fashion sense at a young age.
- When the company revealed Anna's debut photo, it mesmerized the public with her stunning visuals.
- Anna has a passion for food, with her favorites being meat and sushi, which reflect her love for both savory and traditional Japanese cuisine.
- Her special skill is jumping rope, an activity she has mastered over time.
- In her free time, Anna enjoys visiting cosmetic shops, a testament to her interest in beauty and fashion, and she loves to unwind by watching K-pop concerts from the comfort of her home.
- A huge fan of the K-pop scene, she admires all K-pop idols, but has a special affection for BLACKPINK and EVERGLOW.
- When it comes to Western music, her favorite singer is Taylor Swift; while her role model in terms of grace and style is the legendary Audrey Hepburn.
- Anna also has a beloved pet dog named Chai, whom she adores and often shares snippets of on social media.

- Narin was born in Sinsa-dong, Gangnam-gu, Seoul, South Korea.
- She comes from a family that includes her parents and a younger brother.
- She attended Seoul Apgujeong Elementary School and Shingu Middle School.
- Narin was the 5th and final member to be revealed, making her debut announcement on August 29, 2024.
- Her nicknames are Lyn and Satourin (사토우린).
- Narin’s favorite color is pink.
- She’s a huge fan of BLACKPINK, with Jennie as her bias.
- Narin is multilingual, fluent in Japanese, English, and Korean.
- She performed Billie Eilish’s song “idontwannabeyouanymore” for her audition.  

- Ella was born in Los Angeles, California, United States.
- She is of mixed heritage, with a Korean mother and a German-American father.
- She has a younger brother named Roman.
- Ella began her career as a model, signing with THEBLACKLABEL in 2018.
- She was the 1st member of the group to be revealed on August 21, 2024.
- Ella is fluent in both English and Korean.
- She is close friends with BLACKPINK's Jennie and has often been referred to as "Little Jennie" due to their striking resemblance.
- Aside from Jennie, Ella is also a fan of BLACKPINK, with her favorite songs being “Kill This Love” and “Playing With Fire.”
- She is a fan of G-DRAGON as well.
- Ella’s audition song for The Black Label was "Creep" by Radiohead.
- She has also been compared to actress and model Devon Aoki.
- Her nickname is Hellen.