Badvillain

YunSeo

윤서 · 김윤서 (Kim Yun-seo)

Kim Yun-seo — Lead Vocalist · Rapper

Badvillain Lead Vocalist Rapper

🎂 March 7, 2004 🌍 Korean 📏 167 cm (5'6") ⚖️ N/A 🩸 Type A 🧠 ESFJ ♋ Cancer

YunSeo is the lead vocalist and rapper of Badvillain, the seven-member South Korean girl group formed by BPM Entertainment. Born Kim Yun-seo on July 3, 2004, in Seoul, South Korea, she brings years of idol-trainee experience to the group, having previously trained under FNC Entertainment, YG Entertainment, and SM Entertainment before competing on the MBC survival show My Teenage Girl. She officially joined Badvillain on May 17, 2024, ahead of the group's June 3, 2024 debut with the single album Overstep. Standing at 167 cm, YunSeo is known among Badvillain members as one of the group's taller members and its resident hummer of catchy background melodies. Fans searching for YunSeo Badvillain profile, YunSeo Instagram, YunSeo MBTI, or YunSeo fun facts will find an easygoing, music-obsessed idol whose role models include BLACKPINK's Jennie, singer-songwriter Heize, and Ariana Grande. Her ESFJ personality shows up in her warmth toward fans and members, while her taste for hip hop and love of dessert cafes round out her off-stage persona. As a lead vocalist and rapper in a competitive 5th generation K-pop girl group, YunSeo has promoted through every Badvillain era from Overstep to Thriller, contributing to the group's 2024 K-World Dream Awards win. Like the rest of Badvillain, YunSeo has navigated a challenging 2026 marked by financial uncertainty at parent company ONE HUNDRED, even as she remains a beloved figure within the group's VILLAIN-ON fandom.

Story

Biography

Who Is YunSeo of Badvillain?

Badvillain‘s YunSeo serves as the group’s lead vocalist and rapper, bringing a warm,
easygoing presence to the BPM Entertainment girl group. Born Kim Yun-seo on July 3, 2004, in
Seoul, South Korea, YunSeo built years of training experience before her Badvillain debut, having previously
trained at FNC Entertainment, YG Entertainment, and SM Entertainment.

Trainee Days and My Teenage Girl

Before joining Badvillain, YunSeo appeared as a contestant on the MBC survival show My Teenage Girl,
gaining early exposure to the spotlight. She was officially revealed as a member of Badvillain on
May 17, 2024, alongside Emma and Vin, ahead of the group’s full debut. On June 3, 2024, Badvillain
launched with the single album Overstep and its title track “Badvillain,” a bass hip-hop dance song
that helped the group’s debut video rack up over 10 million views within 17 hours.

Personality, Positions, and Fun Facts

Standing 167 cm (5’6″) tall, YunSeo is often noted as one of the taller members of Badvillain. Her
groupmates describe her as the one who is always humming background melodies, and she has cited BLACKPINK’s
Jennie, Heize, and Ariana Grande as her musical role models. With an ESFJ personality,
YunSeo enjoys finding good dessert restaurants, eating ice cream, listening to hip hop, collecting cosmetics, and
taking pictures with friends.

YunSeo has promoted through Badvillain’s entire catalog to date, including “Hurricane” (2024), “Zoom” (2024), and
“Thriller” (2025). The group earned the Next Leader Award at the 2024 K-World Dream Awards and a Fans’
Choice nomination at the 2024 MAMA Awards.

Where Is YunSeo Now?

Amid the financial troubles affecting BPM Entertainment’s parent company, ONE HUNDRED, in 2026, YunSeo has been
reported to have created a new personal Instagram account separate from the group’s official page, mirroring similar
moves by several groupmates as fans await clarity on Badvillain’s future.

Profile

Basic Information

Stage Name	YunSeo
Full Birth Name	Kim Yun-seo (김윤서)
Date of Birth	July 3, 2004
Birthplace	Seoul, South Korea
Hometown	Seoul, South Korea
Nationality	Korean
Height	167 cm (5'6")
Weight	N/A
Blood Type	A
Zodiac Sign	Cancer
MBTI	ESFJ
Education	Former FNC, YG, and SM Entertainment trainee; My Teenage Girl contestant
Agency	BPM Entertainment
Debut	June 3, 2024 (Badvillain, "Overstep")
Languages	Korean, English
Nicknames	N/A
Hobbies	Finding dessert restaurants, eating ice cream, listening to hip hop, collecting cosmetics, taking pictures
Favorite Color	Pink, Black
Ideal Type	Not officially confirmed

Membership

Groups & Positions

Badvillain

BPM Entertainment

Lead Vocalist Rapper

June 2024 – Present

The Lineup

Group Members — BADVILLAIN

Emma

Main Dancer · Rapper

Chloe Young

Leader · Main Rapper · Dancer

HU'E

Main Vocalist

INA

Dancer · Rapper

YunSeo

Lead Vocalist · Rapper

This Idol

Journey

Career Timeline

2021

BPM Entertainment is founded

Big Planet Made Entertainment (BPM Entertainment) is established as a subsidiary under the ONE HUNDRED umbrella, later debuting VIVIZ before building its first in-house trainee group.

2024

Introduced as a BPM Entertainment trainee group

BPM Entertainment reveals plans to debut its first self-trained girl group, later confirmed as a seven-member lineup.

2024

Revealed as a BADVILLAIN member

Introduced to the public through BPM Entertainment's official teaser rollout ahead of the group's debut.

2024

Debut with "Overstep"

BADVILLAIN officially debuts on June 3, 2024 with the single album Overstep, led by the title track "Badvillain."

2024

Special single "Hurricane" released

BADVILLAIN releases the trap hip-hop track "Hurricane" on June 24, continuing debut promotions.

2024

"Zoom" comeback

BADVILLAIN returns with the single "Zoom" on November 19, expanding the group's bold performance identity.

2025

Fandom name "VILLAIN-ON" unveiled

On the group's first debut anniversary, BPM Entertainment reveals the official fandom name VILLAIN-ON (빌리온).

2025

"Thriller" comeback

BADVILLAIN releases the single "Thriller" on September 15, marking the group's most recent comeback.

2026

Agency financial crisis affects activities

Reports emerge of severe financial and contractual troubles at parent company ONE HUNDRED, leading BADVILLAIN to pause public promotional activities.

2004

Born in Seoul, South Korea

Kim Yun-seo is born in Seoul, South Korea, later training at FNC, YG, and SM Entertainment before joining BPM Entertainment.

Music

Discography

🎧

Badvillain

Title Track

2024

🎧

Hurricane

Special Single

2024

🎧

Zoom

Single

2024

🎧

Thriller

Single

2025

Recognition

Awards & Achievements

🏆

Next Leader Award (with BADVILLAIN)

K-World Dream Awards

2024

🏆

Fans' Choice Nominee (with BADVILLAIN)

Mnet Asian Music Awards (MAMA)

2024

Did You Know?

Trivia & Fun Facts ✨

★

Born in Seoul, South Korea, on July 3, 2004.

★

Birth name is Kim Yun-seo (김윤서).

★

Former trainee at FNC Entertainment, YG Entertainment, and SM Entertainment.

★

Competed on the MBC survival show My Teenage Girl before joining Badvillain.

★

Officially revealed as a Badvillain member on May 17, 2024.

★

Stands 167 cm (5'6") tall, making her one of the taller members of the group.

★

Her blood type is A.

★

Her MBTI type is ESFJ.

★

Her zodiac sign is Cancer, and her Chinese zodiac sign is the Monkey.

★

Considered a very easygoing, low-maintenance personality by her members.

★

Her favorite colors are pink and black.

★

Members say she's the one most often humming background melodies.

★

Cites BLACKPINK's Jennie, Heize, and Ariana Grande as her musical role models.

★

Enjoys finding good dessert restaurants and trying new ice cream flavors.

★

A fan of hip hop music in her free time.

★

Collects cosmetics as a hobby.

★

Enjoys drinking sodas and taking pictures with friends and members.

★

Debuted with Badvillain on June 3, 2024, via the single album Overstep.

★

Promoted through Badvillain's "Hurricane," "Zoom," and "Thriller" eras.

★

Part of the Badvillain lineup that won the Next Leader Award at the 2024 K-World Dream Awards.

★

One of two members, alongside INA, listed as sharing a dorm room as of mid-2025.

★

Serves as both a lead vocalist and rapper within the group's line distribution.

★

Is part of a seven-member lineup that also includes Emma, Chloe Young, HU'E, INA, Vin, and Kelly.

The Fandom

Fan Club & Fan Name 💜

Official Fan Name

VILLAIN-ON (빌리온 · "BILLION")

BADVILLAIN's official fandom name, revealed on June 3, 2025 to mark the group's first debut anniversary. The name blends the "V" from VILLAIN, an "O" shaped like a power symbol, and an "N" shaped like a lightning bolt, symbolizing the powerful start shared by BADVILLAIN and their fans.

Official Fan Color

To Be Announced

BPM Entertainment has not yet unveiled an official BADVILLAIN fandom color as of 2026.

Official Light Stick

TBA (Official Light Stick Not Yet Released)

As of 2026, BADVILLAIN and BPM Entertainment have not released an official group light stick.

Fan Community Platform

Daum Cafe & Naver TV

BADVILLAIN connects with VILLAIN-ON through the group's official Daum Fancafe, Naver TV channel, and social accounts run by BPM Entertainment.