D-ONE Members Profile and Facts
D-ONE (디원) is a 6-member South Korean boy group under Mainbase Entertainment. The group consists of Jaehoon, Ihwa, Hyunwoong, Han, Sejin, and Jooyoung. Doyul left the group on August 29, 2023. They debuted on November 26, 2022, with their first digital single, “Torch”.
Group Name Meaning: D-1 signifies the day before a special occasion. It is a day filled with anticipation and excitement for what lies ahead. D-ONE aims to be a constant source of such anticipation and excitement.
Official Greeting: “Hello. We are D-ONE!”
D-ONE Official Fandom Name: Diary
Fandom Name Meaning: N/A
D-ONE Official Color: N/A
D-ONE Official Logo:
Official SNS:
Instagram: @done_officialjp
X: @DONE_OFFICIALJP
TikTok: @d_one.official
YouTube: D-ONE OFFICIAL
D-ONE Member Profiles:
Jaehoon
Stage Name: Jaehoon (재훈)
Birth Name: N/A
Position(s): Leader, Main Vocalist, Main Dancer
Birthday: January 2, 1997
Zodiac Sign: Capricorn
Chinese Zodiac Sign: Rat
Height: N/A
Weight: N/A
Blood Type: N/A
MBTI Type: N/A
Nationality: Korean
Instagram: @j_hoon0102
Jaehoon Facts:
– Jooyoung thinks that he is solution-oriented and is good at helping people resolve their problems. He also thinks Jaehoon is a good dancer, so there is a lot to look forward to when supporting him.
– According to Han, he is very kind and has a great personality. He is dependable, likes taking care of and loves people and is affectionate. Han believes Jaehoon is what you would call a real leader.
Ihwa
Stage Name: Ihwa (이화)
Birth Name: N/A
Position(s): Main Vocalist, Main Dancer
Birthday: December 6, 1996
Zodiac Sign: Sagittarius
Chinese Zodiac Sign: Rat
Height: N/A
Weight: N/A
Blood Type: N/A
MBTI Type: N/A
Nationality: Korean
Instagram: @hi_ihwa
TikTok: @hi_ihwa
Ihwa Facts:
– He would like to try growing his hair long like Stray Kids‘ Hyunjin or Felix and would also like to try dying it white again.
– He says he is not one to go out much, so only leaves when he has something to do or to play soccer.
– Ihwa has completed his military service.
– He was popular among the student body when he was in high school. During breaks, students would ask him to dance for them and that is how he made lots of friends.
– One thing that cheers him up is playing soccer. He enjoys taking powerful shots, which feels refreshing when he does it successfully, but when he cannot get it right, he gets stressed.
– If he was a fan of the group, he would choose himself as his bias.
– Ihwa likes artists that are all-rounders, people that are good at both singing and dancing. He aspires to become such an artist.
Hyunwoong
Stage Name: Hyunwoong (현웅)
Birth Name: Kim Hyun Woong (김현웅)
Position(s): Main Rapper
Birthday: February 8, 1998
Zodiac Sign: Aquarius
Chinese Zodiac Sign: Tiger
Height: 182 cm (6’0”)
Weight: 63 kg (139 lbs)
Blood Type: O
MBTI Type: N/A
Nationality: Korean
Instagram: @____khw____
Hyunwoong Facts:
– Hyunwoong is a former member of 14U (and its sub-unit Lucky) (2017-2019) and 2Z (2019-2020).
– His hobbies include exercising, playing basketball, producing music, and writing lyrics.
– He has a brother.
– He has writing credits on 14U‘s “Don’t Be Pretty” and 2Z‘s “1822”, “Roulette”, “My 1st Hero”, “Keep The Promise”, and “25”.
– His specialties are dancing, rapping, acting, painting, and twisting his tongue.
– His role models are his parents and ZICO.
– Hyunwoong loves free things.
– He takes an interest in fashion.
– His favorite season is autumn.
See more facts about Hyunwoong…
Han
Stage Name: Han (한)
Birth Name: N/A
Position(s): Vocalist
Birthday: September 30, 1998
Zodiac Sign: Libra
Chinese Zodiac Sign: Tiger
Height: N/A
Weight: N/A
Blood Type: N/A
MBTI Type: N/A
Nationality: Korean
Instagram: @ha._.ney
Han Facts:
– The makeup he likes changes depending on the day, but personally, he likes makeup where coolness and cuteness co-exist. He prefers slightly androgynous makeup.
– He would like to try black hair and would also like to get a perm at least once. He is drawn to fluffy hair.
– An artist he admires is ALPHA DRIVE ONE‘s Sangwon because of his beautiful features.
– He was the vocalist in a band in high school.
– Han previously felt better when playing games, but recently cleaning while listening to music cheers him up. His mood improves and it relieves stress.
– If he was a fan of the group, his bias would be Jaehoon.
Sejin
Stage Name: Sejin (세진)
Birth Name: Lee Se Jin (이세진)
Position(s): Sub Vocalist, Dancer
Birthday: July 22, 1999
Zodiac Sign: Cancer
Chinese Zodiac Sign: Rabbit
Height: 175 cm (5’9″)
Weight: 53 kg (117 lbs)
Blood Type: O
MBTI Type: N/A
Nationality: Korean
Instagram: @ss._.sejin
TikTok: @sejin_official
Sejin facts:
– He is former member of 14U (2017-2019).
– Sejin is also a former member of pre-debut groups UTH (2019-2020), C on H (2020), and FLORET (2020-2021), as well as YOURS project (2020).
– He previously ran a YouTube channel with fellow former UTH and YOURS (and current NINE.i) member LAVIN, where they would post music-related content.
– His role models are NCT, Yoon Jungshin, and G-DRAGON.
– His charming point is his reverse charm.
– Sejin’s specialties are playing soccer and creating a chilly (awkward) atmosphere.
– His nickname is “Haribo” because of his love of jellies.
– He says that he tends to be popular with dogs. Playing with them tends to cheer him up.
– He enlisted in the military on October 14, 2021, and has since completed his service.
– His family has three dogs at home, two mixed-breed and one poodle.
– His hobby is cracking dad jokes.
– He would like to try a hairstyle with bangs but would also like to try parting his hair down the middle and sweeping the bangs to the side.
– If he was a fan of the group, his bias would be Hyunwoong because he is full of many different charms. His four-dimensional personality and cool aura as a rapper are things Sejin doesn’t have, so he thinks Hyunwoong is cool.
– His favorite number is 0.
– He was introduced as a new member on November 27, 2023.
Jooyoung
Stage Name: Jooyoung (주영)
Birth Name: Choi Joo Young (최주영)
Position(s): Maknae
Birthday: January 7, 2002
Zodiac Sign: Capricorn
Chinese Zodiac Sign: Snake
Height: 180 cm (5’11”)
Weight: 65 kg (143 lbs)
Blood Type: B
MBTI Type: ENFP
Nationality: Korean
Instagram: @joo__zer0
Jooyoung Facts:
– Education: Kookje University (K-POP Major)
– He was born in Iksan, Jeollabuk-do, South Korea.
– Jooyoung is a former member of IB147 (2023-2024).
– He has a sister.
– He likes natural makeup that isn’t overdone and likes skin that is dewy and glossy.
– Jooyoung wants to grow his hair out to about bob length and would also like to have medium-length hair and try wearing it half up.
– Dogs tend to take a fond liking to him and tend to be affectionate towards him.
– His favorite colors are pink, blue, black, and white.
– He gets cheered up by hearing comments such as “You’ve improved so much at dancing and singing” or “You really worked hard, good job”.
– His specialties are playing instruments, badminton, and acting.
– Jooyoung’s favorite song is “The Real” by ATEEZ.
– He loves eating and can eat two or three bowls of good food.
– His charming point is that contrary to having a cold appearance, he has a lively and bright personality.
– If he was a fan of the group, his bias would be Jaehoon.
– He was introduced as a new member on February 17, 2025.
Former Member(s):
Doyul
Stage Name: Doyul (도율)
Birth Name: Kim Do Yul (김도율)
Position(s): Main Rapper
Birthday: April 7, 1997
Zodiac Sign: Aries
Chinese Zodiac Sign: Ox
Height: 179 cm (5’10”)
Weight: 63 kg (139 lbs)
Blood Type: A
MBTI Type: N/A
Nationality: Korean
Instagram: @doyulitos
Doyul Facts:
– He made his solo debut on February 8, 2025, with the single “Rainy Day”.
– Doyul is a former member of 14U (2017-2019) and its sub-unit Xplosive.
– He auditioned for the JTBC survival show PROJECT 7 (2023) but was unable to pass the survival round.
– His hobbies include rapping and writing song lyrics.
– His role models are Hwang Gyeongmin, Lee Minho, GIRIBOY, and his parents.
– Doyul’s specialty is acting.
– His favorite color is pink.
– He is currently signed with MOREDAY for his solo activities.
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Who is your D-ONE bias? Do you know more facts about them? Feel free to comment down below.