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I.O.I Profile


Left to right: (Doyeon, Chaeyeon, Sohye, Yoojung, Sejeong, Chungha, Somi, Mina, Zhou (Official Stage Name according to YMC Entertainment’s teaser image), Yunjung, Nayoung)

I.O.I (Korean: 아이오아이, also known as IOI) is a South Korean girl group under YMC Entertainment and CJ E&M. The members consist of Somi, Sejeong, Yoojung, Chungha, Sohye, Zhou, Chaeyeon, Doyeon, Mina, Nayoung, Yunjung. They made their official debut on May 4, 2016 with their debut mini album ‘Chrysalis” and held their debut stage on Mnet’s M! Countdown on May 5, 2016.



Birth Name: Lim Na Young (임나영)

Stage Name: Nayoung

Position: Leader, Main Rapper

Position in sub-unit: Leader, Main Rapper

Nickname: Corpse Bride

Birthday: December 18, 1995

Height: 171 cm

Weight: 50 kg

Blood Type: O

Trainee Period: 4 years 7 months

Hobby(ies): Listening to Music, Manicure, Drawing

Speciality(ies): Dancing (Urban)

Education: Dongduk Girls University

Strength: Calm, Careful, Respectful

Weaknesses: Too Serious

Favorite Group: Girls’ Generation

Role Model: (Domestic: Suzy, Uee) (International: Angel Haze)

Motto: If you do it, it works out

Life Goal: Not just me, but everybody be happy

Company: Pledis 


Birth Name: Kim Chung Ha (김청하)

Stage Name: Chungha

Position: Main Dancer, Lead Rapper, Sub Vocalist

Position in sub-unit: Main Dancer, Main Vocalist

Birthday: February 9, 1996

Height: 161 cm

Weight: 44 kg

Blood Type: A

Trainee Period: 3 years 3 months

Hobby(ies): Watching Movies

Speciality(ies): Dance

Company: M&H


Birth Name: Kim Se Jeong (김세정)

Stage Name: Sejeong

Position: Main Vocalist

Birthday: August 28, 1996

Height: 164 cm

Weight: 48 kg

Blood Type: AB

Trainee Period: 1 year 11 months

Hobby(ies): Painting, Re-watching movies

Speciality(ies): Ballad

Education: Indeogwon High School

Company: Jellyfish Entertainment

Current Group: gugudan / gu9udan


Birth Name: Jung Chae Yeon (정채연)

Stage Name: Chaeyeon

Position: Sub Vocalist

Date of Birth: December 1, 1997

Height: 166 cm

Weight: 49 kg

Blood Type: A

Trainee Period: 8 months

Hobby(ies): Mobile Games, Movies

Speciality(ies): Dance, Aegyo, Skating

Place of Birth: Jorye-dong, Suncheon-si, Jeollanam-do, South Korea

Education: School of Performing Arts Seoul

Company: MBK

Current Group: DIA

Kyeolkyung (zhou jieqiong)

Birth Name: Zhou Jie Qiong (周洁琼)

Stage Name: Zhou

Introduce herself as: Kyeolkyung

Position: Lead Dancer, Sub Vocalist

Position in sub-unit: Lead Dancer, Lead Vocalist

Korean Name: 주결경

Nickname: Pinky

Birthday: December 16, 1998

Height: 166 cm

Weight: 47 kg

Blood Type: O

Trainee Period: 5 years 5 months

Hobby(ies): Window shopping, searching beauty sites

Speciality(ies): Dance, Instruments (Pipa, Guitar)

Place of Birth: Shanghai, China

Education: School of Performing Arts Seoul

Strengths: Adapts faster than others

Weaknesses: Thin Ears

Favourite Group: Girls’ Generation, f(x), After School

Role Model: Nana

Company: Pledis


Birth Name: Kim So Hye (김소혜)

Stage Name: Sohye

Position: Sub Vocalist 

Position in sub-unit: Sub Vocalist

Birthday: July 19, 1999

Height: 163 cm

Weight: 48 kg

Blood Type: A

Trainee Period: 1 year

Hobby(ies): Picking up trash

Speciality(ies): Ocarina, Volleyball

Education: Kyunggi Girls’ High School

Company: Shark & Penguin Entertainment


Birth Name: Yu Yeun Jung (유연정)

Stage Name: Yunjung

Position: Main Vocalist

Birthday: August 3, 1999

Height: 167 cm

Weight: 52 kg

Blood Type: A

Trainee Period: 1 year 3 months

Hobby(ies): Playing alone

Speciality(ies): Makchum

Education: Hanlim Multi Art School

Company: Starship Entertainment

Current Group: Cosmic Girls


Birth Name: Choi Yoo Jung (최유정)

Stage Name: Yoojung

Nickname: Udon

Position: Lead Vocalist, Lead Dancer, Lead Rapper

Position in sub-unit: Lead Vocalist, Lead Dancer, Lead Rapper

Birthday: November 12, 1999 

Height: 159 cm

Weight: 44 kg

Blood Type: O

Trainee Period: 4 years 7 months

Hobby(ies): Dancing, Painting, Photography

Speciality(ies): Acoustic Songs, Hip-hop

Education: Seoul Music High School

Strengths: Cheerful, Love to smile, Sociable

Weaknesses: Slow to open up to strangers

Favourite Group: 2NE1

Role Model: Rihanna

Motto: Don’t forget your roots, think of other first

Life goals: Love your life until your death

Company: Fantagio


Birth Name: Kang Mi Na (강미나)

Stage Name: Mina

Position: Lead Dancer, Lead Rapper Sub Vocalist

Birthday: December 4, 1999

Height: 162 cm

Weight: 48 kg

Blood Type: O

Trainee Period: 1 year 1 month

Hobby(ies): Travel Alone, Watching Drama, Play Games

Speciality(ies): Waacking Dance

Education: School Of Performing Arts Seoul

Education: Sangji Girls’ High School

Company: Jellyfish Entertainment

Current Group: gugudan / gu9udan


Birth Name: Kim Do Yeon (김도연)

Stage Name: Doyeon

Position: Sub Vocalist

Position in sub-unit: Sub Vocalist

Age: December 4, 1999

Height: 172 cm

Weight: 50 kg

Blood Type: O

Trainee Period: 1 year 5 months

Hobby(ies): Watching Movies, Listening to Music

Speciality(ies): KPop Dance

Education: Wonju, Gangwondo, South Korea

Company: Fantagio


Birth Name: Ennik Somi Douma {Jeon So Mi (전소미)}

Stage Name: Somi

Position: Center, Lead Vocalist, Lead Rapper, Maknae

Position in sub-unit: Center, Lead Vocalist, Lead Rapper, Maknae

Date Of Birth: March 9, 2001

Height: 168 cm

Weight: 48 kg

Blood Type: O

Trainee Period: 2 years

Hobby(ies): Collecting Socks, Shopping, Walking Alone, Search for Good Music, Search for good restaurants

Speciality(ies): Taekwondo, Caricatures, cooking

Education: Seoyun Middle School

Company: JYP 

Former Contestant of SIXTEEN

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  1. I love them so much IOI fighting!!!

  2. Somi should be the Lead Dancer, Lead rapper, Lead Vocalist, Face of the griup, Center and Maknae. 👍

    • wtf shes not even that good- and sejeong, jieqiong and doyeon are all prettier than her imo

      • ioi will not be ioi without somi. why compare?

        • think before you type

          lol what do you mean I.O.I will be I.O.I without somi? Somi just became that popular because she’s from jyp, see? when she joined sixteen she didn’t win because also of lack of votes since her competitors are also from jyp. Now when she joined produce 101 she got alot of votes from jypstan since she’s the only contestant that’s from jyp. Don’t tell me that she won because of talent? yes she’s talented but how about the others that’s talented than her? if she won by talent then others couldve gotten in 1st place because don’t tell me she’s the most talented there?

          I.O.I without somi is nothing? lol look at their songs, somi barely even get a line.

      • dude keep your opinion for yourself.Their all pretty so just stop it

    • if that happens ioi will not be group and somi will just be a solo artist

    • Face of the group and center is the same title.. It show that sge was the most popular in IOI

      • Face of the group means you’re the visual aka the prettiest in the group.
        While Center means you’re in the center in the performance.

        i hope you would understand this.

        • Being the visual means you are the visual. The face is the center member or the most known member. In sistar for example, hyorin is the face but Dasom is the visual.

  3. [INFO] Mina and Doyeon was bron on the same month, same day and same year

  4. q bire’ ioi..jgn coba ngalahin twicee
    awass lohhhh,,dsar plagiat

    • ioi plagiat twice? darimana mba, ngomongnya ngaco bhak.

    • Nur aishatul amani

      Oiiii….bila masa ioi itu plagiat sama twice….kamu itu tiba2 datang…terus ngomong macem2 ‘about’ ioi….ioi itu asli…..twice juga asli….gak meniru sapa2 kok….jgn tuduh sembarangan okkkk…tuih..

  5. Doyeon high is 172cm not 170..

  6. I’m really curious on how RedLine Kim So-Hye did it. I mean, during the competition… she did not do very much. And she’s in F. But then, congratulations.

  7. So-hye did the best that she could. It’s the people’s decision not hers.

  8. Am I the only one who thinks that Sejeong (who is adorable by the way) looks like a female S.Coups? When she smiles, it’s especially creepy hahahahhahaha.

  9. left-right : chaeyeon, Zhou, mina, sejeong, somi, nayoung, sohye, chungha, yoojung, yunjung and doyeon

  10. Jung Chae Yeon, already left i.o.i and returns back to DIA? feel so sad to hear that…unacceptable!

    • wait wait, she’s not leaving yet, she still joining I.O.I but also returns back to DIA, like being in two groups

  11. wowwwwwwwwwwwww so beautiful group and so cuteeeeeeeeeeeeeeeeeeeeee

  12. falling in love with Sohye and her passion, people mocking her at the beginning of the show and now she became a member of I.O.I, she really do her best, everyone do their best, Kim Sohye Fighting!! ^^

  13. So hype ! 😍 She was pad in singing but now she has amazing voice I wish for her to be the best

  14. I LOVE them so much
    I.O.I fighting!!!!!
    gorgeous girls

  15. I hope ioi will last forever…….

  16. I love ioi so much it sad if their appear anymore….😢😢😢😢😢😢😢😢

  17. Please don’t disbands ioi group i like them so much…..

  18. I love se jeong and so hye much😊😊

  19. chungha and somi aren’t the official rappers you should take that out

  20. #ohayo#momo#marsya

    How sejong,Mina,yunjung and chae yeon return back to ioi?
    All of them in a different group right.

  21. Zhou reminds me of Seventeen’s Joshua!

  22. I think sejeong is the prettiest and could be the face of the group because she is the most popular one in the group

  23. somi is same age with me but she have different life because now we should be a student and still study but she is entainer and very popular..

  24. chungha is lead vocalist not sub vocalist

  25. omg!!! wait a minute….is that yoo jung from ASTRO BREATHLESS MV???she is so cute 🙂 btw, somi is in the same age with me 🙂

  26. wow Birthday Jeon Somi same with me .. she is only a year older than me … yeah haha..but she very talented and pretty.. ^_^

  27. Somi 2001? Yaampun gue kira udah kuliah haha. Muka dewasa amat dah

  28. im really sad i really want more project for them…they’re all good…
    speacially Chaeyeon she’s so pretty

  29. Omg I have the same nickname with the girl who’s named Zhou ? I only know Somi in this group cause I watched Sixteen and I have a same age like her ♡♡ Damn I adore her so much and always support her ♡♡

  30. wow that nice

  31. kereen mang, asaluluyyy…

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