In4mal Members Profile and Facts
In4mal (인포머), formerly known as Rotifle Crew (로티플 크루), Dobermann (도베르만), and V-STAR (브이스타), was a South Korean pre-debut boy group under LOEN Entertainment, consisting of 5 members: Seulgi, J-FEEL, Seungheon, Yoonseok, and Choi Jun. The group was originally formed and introduced in early 2014 as a hip-hop crew named Rotifle Crew under Jaychan International, composed of Seulgi, J-FEEL, Seungheon, Youngho, and Choi Jun. In collaboration with AllBlack Entertainment, they began joint promotions with GP Basic and Nop.K under the name AllBlack Crew in February 2014. Throughout March, Rotifle Crew continued to promote their pre-debut track “4AM” at various live performances. Around July 2014, the group rebranded as Dobermann. On September 20, they changed their name again to V-STAR, and their latest 5-member lineup came to be following several lineup changes. That same month, they appeared in the K-drama My Lovely Girl, and on October 2, released its OST “Pray (Male Ver.)”. They subsequently changed their name once more to In4mal to match the fictional group they played in the drama. In March 2015, the group transferred to LOEN Entertainment and announced plans for an official debut with a single. However the debut was eventually cancelled, and the group is presumed to have disbanded by mid-to-late 2015.
Group Name Meaning: In4mal = informal, Dobermann = Urban street and gentlemanly aggressive and daring Doberman
Official Greeting: “1, 2, 3, Hello, we are In4mal!” (하나, 둘, 셋! 안녕하세요, 인포머입니다!)
In4mal Official Fandom Name: N/A
Fandom Name Meaning: N/A
In4mal Official Color: N/A
In4mal Official Logo:
(Rotifle Crew – Dobermann – In4mal)
Official SNS:
X: @Official_In4mal/ @AllBlack_crew
Facebook: Rotifle CREW
In4mal Member Profiles:
Seulgi
Stage Name: Seulgi (슬기)
Birth Name: Son Seul Gi (손슬기)
Position(s): Sub Vocalist, Visual
Birthday: January 18, 1990
Zodiac Sign: Capricorn
Chinese Zodiac Sign: Horse
Height: 183 cm (6’0″)
Weight: 68 kg (149 lbs)
Blood Type: N/A
MBTI Type: N/A
Nationality: Korean
Instagram: @ss_g_0118
YouTube: sru King/ 슬기로운 라이프 Life of Seulgi
Ameba: Son Seulgi ( Haru )
Seulgi Facts:
– He’s from Incheon, South Korea.
– He was an original member.
– Seulgi is a former member of Offroad (2012-2013) under the name G.I (지아이), and B.Crown (2016-2020).
– He made his solo debut on August 6, 2018, with the single “Good bye” under the stage name Haru (하루).
– He’s currently active as a musical and theatre actor. Some plays he acted in include I got talent, Shanghai 1932-34, What If, Lineup: The Audition, and more.
– Seulgi completed his military service from June 2018 to February 22, 2020.
– He served in the military alongside CNBLUE‘s Jungshin, BTOB‘s Eunkwang, and HIGH4‘s Youngjun and performed with them at the Ground Army Festival 2019.
– He loves to eat and has a big appetite, and eats as he pleases as he doesn’t gain weight easily.
– One five-character word he would use to describe himself is 다이아몬드 (diamond).
J-FEEL
Stage Name: J-FEEL (제이필), also stylized as J.FEEL
Birth Name: Kang Seon Gyu (강선규)
Position(s): Rapper
Birthday: February 3, 1990
Zodiac Sign: Aquarius
Chinese Zodiac Sign: Horse
Height: 184 cm (6’0″)
Weight: N/A
Blood Type: B
MBTI Type: N/A
Nationality: Korean
Instagram: @333_seongyu
J-FEEL Facts:
– He was an original member.
– He is a former member of PURE (2012-2014) under the stage name Black Jimin (블랙지민).
– J-FEEL is the CEO of Neo Studio, a media production company specializing in planning and producing TV broadcast advertising content and creating branded content.
– He briefly went by the name Samhal (삼할) after In4mal‘s disbandment.
– His hobbies include running, composing, and writing lyrics.
– Back then, he preferred being out and about rather than staying in the dorms.
– An artist he would like to collaborate with is the band Cherry Filter.
– His ideal type is someone with charm rather than just good looks. If he had to choose a female idol, it would be CL.
Seungheon
Stage Name: Seungheon (승헌)
Birth Name: Baek Seung Heon (백승헌)
Position(s): Lead Vocalist
Birthday: April 3, 1991
Zodiac Sign: Aries
Chinese Zodiac Sign: Goat
Height: 183 cm (6’0″)
Weight: 68 kg (149 lbs)
Blood Type: N/A
MBTI Type: N/A
Nationality: Korean
Instagram: @illbbaek
X: @bhs_u
Seungheon Facts:
– He was born in Seoul, South Korea.
– Seungheon was an original member.
– He is a former member of AFOS (2015-2016) under the stage name BK (비케이).
– He made his solo debut on November 2, 2021, with “Til the Sun Rises” under C.Two Entertainment.
– Seungheon made his acting debut with a support role in the 2014 K-drama Hi! School – Love On. He also appeared in Something about 1 Percent, My Secret Romance, Hong Ik Super, So I Married an Anti-Fan, the movie Jane’s Summer, and the musical 여도.
– He was formerly signed as an actor to DreamT Entertainment (2018) and GH Entertainment.
– Seungheon starred in the music video for “It’s raining” by Kyung Dasom.
– Before making his solo debut he was preparing to debut as part of another group, but was offered the chance to go solo instead and decided to take it.
– He was with several agencies before joining C.Two Entertainment.
– He’s close with Kim Jaejoong, who supported him throughout his solo debut preparation, contributed to the writing and production (marking Jaejoong‘s first time creating a song for another artist), and even appeared in his music video.
– Seungheon is also friends with 2PM‘s Chansung, BLACK6IX‘s Jongwoon, Block B‘s B-Bomb, FTISLAND‘s Seunghyun, SPEED‘s Yuhwan, INFINITE‘s Woohyun, the members of F.CUZ, DGNA, and more.
– He competed in the SH CUP 2016 as part of the celebrity soccer team FC Men.
– He initially faced strong opposition from his parents in pursuing an idol career. They would even hide his clothes and shoes to keep him from going out. But they eventually grew to be supportive.
– Seungheon describes himself as a hands-on artist, actively involved in every aspect of his solo releases, from production and choreography to styling.
– He used to study performances by global artists like Justin Timberlake to improve his facial expressions and stage presence.
– He would love to try a sexy concept like “Trouble Maker”.
– Artists he hopes to collaborate with one day include former After School‘s Kahi and Miss A’s Min.
– His specialties include cooking and sports.
Yoonseok
Stage Name: Yoonseok (윤석)
Birth Name: Choi Yoon Seok (최윤석)
Position(s): Main Vocalist
Birthday: December 8, 1992
Zodiac Sign: Sagittarius
Chinese Zodiac Sign: Monkey
Height: N/A
Weight: N/A
Blood Type: N/A
MBTI Type: N/A
Nationality: Korean
Instagram: @yoon______seok
Facebook: 최윤석
YouTube: YOONSEOK
Soundcloud: YOONSEOK
Yoonseok Facts:
– He’s from Paju, Gyeonggi Province, South Korea.
– He joined the group in July 2014, when the group rebranded to Dobermann.
– Yoonseok is a former member of the performance group Wurrup’z (~2013).
– He made his solo debut on March 16, 2019, with the single “ON MY WAY” featuring VIXX‘s KEN.
– Yoonseok is part of the hip hop crew Code Chameleon/ CODA Crew alongside MONSTA X‘s I.M, Wooki, and former AFOS and HIGHEND member OF’F.
– He is part of the music creator duo WE : OUTPOOT.
– He participated in the digital survival show Burn Up (2020).
– Yoonseok completed his military service as an active duty soldier from June 26, 2012, to March 25, 2014.
– He writes and composes his own music, and has contributed songs for artists like MONSTA X, MOMOLAND, THE BOYZ, VICTON, and KEN. He also participated in the writing of “Be Mine” and “Circuit” for the survival show PEAK TIME.
– Yoonseok works as a vocal trainer.
– He is close friends with VIXX‘s KEN, BTOB‘s Hyunsik, and former BIGSTAR and UNB‘s Feeldog.
– He has an older sibling.
– His hobbies include soccer and exercising.
– His specialty is singing.
– He describes himself as someone who’s shy and loves pulling pranks.
Choi Jun
Stage Name: Choi Jun (최준)
Birth Name: Choi Jun Young (최준영)
Position(s): Maknae, Rapper
Birthday: November 27, 1996
Zodiac Sign: Sagittarius
Chinese Zodiac Sign: Rat
Height: 180 cm (5’11”)
Weight: 65 kg (143 lbs)
Blood Type: B
MBTI Type: N/A
Nationality: Korean
Instagram: @j_young1996/ @bar_nele
X: @chlwnsdud199
YouTube: JOOEN 1127
Choi Jun Facts:
– He was an original member.
– He’s a former member of AFOS (2015-2017) under the stage name Jooen (주엔).
– Choi Jun participated in Produce 101 Season 2 (2017) as an STL Entertainment trainee, where he ranked 90th.
– On May 12, 2017, following his elimination from Produce 101, he released a song titled “FINE” followed by a remake of Black Nut’s “Beenzino”, retitled “101”, on June 30, expressing his feelings about his elimination and experience on the show.
– He was a backup dancer for GP Basic‘s “Pika-Burnjuck”.
– He currently works as a bartender and runs his own cocktail bar named Bar, nelé (바눌레).
– Choi Jun ranked top 20 in a bartending competition by Woodford Reserve in 2025.
– He became close with TEMPEST‘s Hyeongseop during Produce 101.
– He’s a fan of TWICE.
– His hobbies and interests include animation, collecting Gundam figures, and copy rap (the process of understanding and practicing the fundamental elements of rap).
– His specialty is assembling plastic model kits.
– He describes himself as a shy, introverted, and serious person, who, nonetheless, can make others laugh effortlessly.
– He loves food and snacks so much that he packed an entire suitcase full of them and even brought a ramen pot with him to the Produce 101 dorms.
– Choi Jun isn’t a fan of sweets like candy and ice cream.
– His goal as an idol was to hold a concert and appear on variety shows like MBC’s I Live Alone.
Former Members:
Gihwan
Stage Name: Gihwan (기환)
Birth Name: Kim Gi Hwan (김기환)
Position(s): Former Maknae
Birthday: November 24, 1993
Zodiac Sign: Sagittarius
Chinese Zodiac Sign: Rooster
Height: 182 cm (6’0″)
Weight: 60 kg (132 lbs)
Blood Type: AB
MBTI Type: N/A
Nationality: Korean
Instagram: @gihwannn__
X: @gihwannn__
YouTube: DOOKIS두키
Gihwan Facts:
– He became a member of Dobermann on July 15, 2014.
– He’s a former member of EASTONE (2017-2018) and SIGNAL (2018-2021).
– Gihwan made his solo debut on November 8, 2021 with the digital single “Running To You”.
– He runs a (currently inactive) YouTube channel with former SIGNAL groupmate LYSON and former AKZ‘s Lee Gihwan under the name DOOKI’S.
Youngho
Stage Name: Youngho (영호)
Birth Name: Noh/ No Young Ho (노영호)
Position(s): Sub Vocalist
Birthday: March 24, 1993
Zodiac Sign: Aries
Chinese Zodiac Sign: Rooster
Height: 179 cm (5’11”)
Weight: N/A
Blood Type: O
MBTI Type: N/A
Nationality: Korean
Instagram: @signal_youngho
X: @signal_youngho
Youngho Facts:
– He’s from Incheon, South Korea.
– He was an original member.
– Youngho left the group in March 2014 as he received an offer from BARA‘s Sooheok to join the group.
– He is a former member of PURE (2012-2013), BARA (2014-2015), and SIGNAL (2018-2021).
– During his time in PURE he went by the stage name Yellow Younghu (옐로영후).
– In 2025 he founded NYH Entertainment, which is currently home to the boy group N.TOP.
– He enlisted in 2015, and has completed his military service since.
– He appeared on the variety show Same Bed, Different Dreams 2: You Are My Destiny (2021).
– Education: Gyesan Middle School, Baekshin High School, Sehan University (Practical Music Department, Bachelor’s Degree)
– He has dreamed of becoming a singer since elementary school, and his passion for singing grew stronger while serving as the vocalist in his high school band.
– He’s been close friends with Yoo Seungho since high school, and is also friends with LUKUS‘ Kyungjin, TARGET‘s Woojin, WE:A‘s Z-UK, NATURE‘s Sohee, Blady‘s Kangyoon, A.Cian‘s Jungsang, BLAST‘s Hangang, and more.
– His special skills are piano, composition, and speaking Japanese.
– His hobbies include writing music, playing the piano, and watching movies.
– He likes eating alone.
– The Korean dishes he recommends are tteokbokki and galbijjim (braised beef short ribs).
– His favorite part of Japanese culture is sushi, especially eel and tuna.
– His ideal type is a nice person like Davichi‘s Kang Minkyung. The heart is more important to him than good looks.
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Pre-debut Release (Fancam):
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