CORTIS (코르티스), short for COLOR OUTSIDE THE LINES, is a five-member boy group under BigHit Music. They debuted on August 18, 2025, with the digital single “What You Want.” The group name reflects their concept of breaking free from conventional boundaries, aiming to inspire creativity and boldness among fans. Even before their debut, CORTIS had already garnered attention for their involvement in music production, choreography, and contributions to senior HYBE artists’ projects.
Full Profile of CORTIS Members
Before diving into the group’s music and achievements, let’s take a closer look at the individual profiles and interesting facts about each member of CORTIS.
James
- Full Name: James (제임스)
- Birthday: October 14, 2005 (19 years old)
- Birthplace: Hong Kong SAR, China
- Zodiac Sign: Libra
- MBTI: INTP
- Facts:
- James grew up in Taiwan and is of mixed Thai (maternal) and Chinese (paternal) descent.
- He is the oldest member and a former trainee of Trainee A.
- Fluent in Thai, Chinese, Korean, English, and Japanese.
- Comfort food is chocolate milk; favorite animals are cats, dogs, and red pandas.
- He contributed to songs “GO!”, “JoyRide,” and “Lullaby” on their debut EP.
- James also co-produced for TXT and ILLIT.
Juhoon
- Full Name: Juhoon (주훈)
- Birthday: January 3, 2008 (17 years old)
- Birthplace: Seoul, South Korea
- Zodiac Sign: Capricorn
- MBTI: ISFP
- Facts:
- Former child model with studies at Sangmyung University Teacher’s College Experimental Elementary School.
- Speaks Korean and English.
- Enjoys basketball and was part of a youth team.
- Joined BigHit Music in 2023–2024.
- Favorite food is ramyeon; favorite animals are cats.
- He contributed to four songs on their EP and loves asking members what they want to eat.
Martin
- Full Name: Martin (마틴)
- Birthday: March 20, 2008 (17 years old)
- Birthplace: Canada
- Height: 190 cm (6’3″)
- Zodiac Sign: Pisces
- MBTI: ENFP
- Position: Leader
- Facts:
- Born to a Canadian father and Korean mother, with one older sister.
- Joined BigHit Music around 2019–2020.
- Tallest and loudest member; eats the fastest.
- Favorite animals are dogs, favorite color is orange.
- Helped create all songs on their EP and co-choreographed “GO!”.
- Produced for TXT, ILLIT, LE SSERAFIM, and ENHYPEN.
Seonghyeon
- Full Name: Seonghyeon (성현)
- Birthday: January 13, 2009 (16 years old)
- Birthplace: Seo-gu, Daejeon, South Korea
- Zodiac Sign: Capricorn
- MBTI: INTP
- Facts:
- Has a younger sister and studied at Daejeon Gwanjeo Elementary School.
- Joined BigHit Music in 2021 and trained for about five years.
- Hobbies include basketball, skateboarding, cycling, and watching dramas.
- Has created around a hundred tracks as a trainee.
- Favorite animals are cats and dogs, favorite color is green.
- Dislikes mint chocolate but enjoys acai bowls.
Keonho
- Full Name: Keonho (건호)
- Birthday: February 14, 2009 (16 years old)
- Birthplace: Suwon, Gyeonggi Province, South Korea
- Zodiac Sign: Aquarius
- MBTI: INTP
- Position: Maknae
- Facts:
- Has an older sister and a pet dog named Cookie.
- Former competitive swimmer with top rankings in elementary school.
- Joined BigHit Music in 2021.
- Prefers winter and salted caramel ice cream.
- Favorite animals are dogs and loves vintage-toned colors.
- Contributed to four tracks on their EP and joined choreography efforts for “GO!”.
Height of All CORTIS Members
Fans often compare the members’ heights, and here is the current lineup starting from the tallest to the shortest.
- Martin – 190 cm (6’3”)
- James – (Height not officially revealed)
- Juhoon – (Height not officially revealed)
- Seonghyeon – (Height not officially revealed)
- Keonho – (Height not officially revealed)
Note: Only Martin’s official height has been confirmed. Other members’ heights are yet to be disclosed.
Popularity of CORTIS Members
Popularity within K-pop groups can vary depending on fan-based trends, performances, and personality. Here’s how CORTIS members are generally ranked in terms of popularity.
- Keonho – Currently the most popular member, often praised for his youthful charm.
- Martin – Highly recognized for his leadership skills and tall visuals.
- James – Loved for his multilingual abilities and charisma.
- Juhoon – Appreciated for his friendliness and appetite.
- Seonghyeon – Admired by fans for his artistic touch and personality.
Roles of CORTIS Members
Each member plays a unique role in shaping the music and identity of the group. Here’s an overview of the official and unofficial roles of the members.
- Martin: Leader, Producer, Vocalist
- James: Vocalist, Lyricist, Multilingual Specialist
- Juhoon: Vocalist, Dancer, Sub-Rapper
- Seonghyeon: Vocalist, Producer
- Keonho: Maknae, Vocalist, Performer
CORTIS may be a newly debuted group, but they have already shown immense potential and creativity through their music and stage presence. With each member actively contributing to production, choreography, and creative ideas, the group has positioned itself as one of the most promising new acts in K-pop. Fans eagerly anticipate how CORTIS will grow and shape the future of the industry with their bold and boundary-pushing concept.
