CORTIS (코르티스) is a five-member South Korean boy group under BIGHIT MUSIC that’s been picking up buzz fast thanks to their confident rookie energy. They made their official debut on August 18, 2025 with their first single, “What You Want,” and they’re also represented in the U.S. by Republic Records.
True to their name—“COLOR OUTSIDE THE LINES”—CORTIS is all about thinking freely, pushing past expectations, and doing things their own way. And that attitude doesn’t just show up in their sound; you can feel it in the personalities behind the performances too.
Now, let’s meet the talented members of CORTIS and get to know what makes each of them stand out.
1) Martin (마틴) — Leader
Martin is the group’s leader, and the first thing most people notice is: yes, he’s very tall (190.5 cm). But beyond visuals, he’s also someone who has been involved creatively—he helped work on all five songs in their EP COLOR OUTSIDE THE LINES, and even took part in choreography for “GO!”.
- Birth name: Martin Edwards
- Korean name: Park Woo-joo
- Birthday: March 20, 2008
- Nationality: Canadian-Korean
- MBTI: INFP/ENFP
- Height: 190.5 cm
2) James (제임스)
James has that “quiet but you’ll notice him” vibe. He was born in Hong Kong and grew up in Taiwan, and he’s of mixed Thai (maternal) and Chinese (paternal) descent. He’s also known as a former member of the trainee group Trainee A, and he speaks 5 languages: Thai, Chinese, Korean, English, and Japanese. He contributed to songs like “GO!”, “JoyRide”, and “Lullaby” on the group’s EP and also participated in choreography for “GO!”.
- Birth name: Zhao Yufan (조우범 / Woobeom is listed as Korean name)
- Birthday: October 14, 2005
- Nationality: Thai-Chinese (Hong Kongese)
- MBTI : INTP (previously ISTJ)
3) Juhoon (주훈)
Juhoon feels like the type who looks calm but is quietly doing everything. He’s Korean, born in Seoul, and he used to be a child model when he was younger. He can speak Korean and English, and he also played basketball in a youth team. He joined BIGHIT Music as a trainee in 2023–2024, and he helped with four songs on their EP, including “What You Want” and “FaSHioN.”
- Birth name: Kim Ju-hoon
- Birthday: January 3, 2008
- Nationality: Korean
- MBTI: ISFP
- Height: 175–176 cm
4) Seonghyeon (성현)
Seonghyeon gives strong “quiet genius” vibes. He’s from Daejeon, has a younger sister, and has reportedly been training for around 5 years (starting when he was 13 in Korean age). He’s into hobbies —movies, dramas, basketball, skateboarding, cycling—and he’s helped with all five songs on the EP COLOR OUTSIDE THE LINES. One standout detail: he has around a hundred tracks that he made as a trainee.
- Birth name: Eom Sung-hyun (English name listed: Sean Eom)
- Birthday: January 13, 2009
- Nationality: Korean
- MBTI: INTP
- Height: 180 cm
5) Keonho (건호) — Maknae
Keonho is the youngest (maknae) and was born in Suwon, Gyeonggi-do. He has an older sister and even has a dog named Cookie (cute). One of the most surprising facts: he ranked highly in swimming and continued it until 6th grade, which explains that athletic vibe. He joined BIGHIT Music in 2021, helped with four songs on the EP (including “JoyRide”), and participated in choreography for “GO!”.
- Birth name: Ahn Geon-ho
- Birthday: February 14, 2009
- Nationality: Korean
- MBTI: INTP
- Height: 178 cm
So, who you choose to be your new bias?
