I.O.I (아이오 아이) is a Korean girl group consisting of 11 members: Somi, Sejeong, Yoojung, Chungha, Sohye, Kyulkyung, Chaeyeon, Doyeon, Mina, Nayoung, Yunjung. I.O.I debuted on May 4, 2016 under the management of YMC Entertainment and CJ E&M. I.O.I officially disbanded on January 29, 2017. On July 1, 2019, it was announced that I.O.I will have a reunion in October 2019 with 9 members. Somi and Yeonjung will not be participating in the reunion due to their scheduled activities. I.O.I is currently part of Studio Blu.

Profile Information I.O.I
I.O.I Fandom Name: -
I.O.I Official Fan Colors: -

I.O.I official account
Twitter: @ioi_official_
Instagram: @ioi_official_ig
Fan Cafe: IOIofficial

I.O.I members profile
• Nayoung (Rank: 10)
Birth Name: Lim Na Young (임나영)
-Artist: Nayoung (나영)
-Location: Leader, Main Rapper, Lead Dancer, Vocalist
Birthday: December 18, 1995
Zodiac: Sagittarius
-Height: 171 cm (5'7 ″)
Weight: 50 kg (110 lbs)
-Blood type O
-Subunit: I.O.I Sub Unit
-Instagram: @ nayoung_lim95

-History, career and interesting things about Nayoung:
Her nickname is Stone Nayoung.
She has an older brother.
Hobbies: Listening to music, doing manicure, drawing.
Education: Dongduk Women's University.
Specialty: Dance.
Favorite group: Girls' Generation.
The role models: Suzy, Uee, Angel Haze.
Strengths: Calm, Careful, Respectful.
Weakness: Too serious.
She is currently a member of the girl group Pristin.
Nayoung appeared in the MV Why Are We? by Troy.
She had a cameo role in the TV series Entourage alongside Kim Chungha.
Life goal: Not only me, but everyone is happy.
Practice period: 4 years and 7 months.
Company: Pledis (when she was a contestant on PD101); as of May 24, 2019, her contract with Pledis has been terminated.
Currently: She is a member of Pristin but on May 24, 2019, Pristin disbanded.

• Chungha (Rank: 4)
Birth Name: Kim Chanmi (김찬미)
-Name: Chungha (청하)
-Location: Main Dancer, Lead Vocalist, Rapper
Birthday: February 9, 1996
Zodiac: Bao Binh
-Height: 161 cm (5'3 ″)
Weight: 44 kg (97 lbs)
-Blood type A
-Subunit: I.O.I Sub Unit
-Instagram: @chungha_official

-History, career and interesting things about Chungha:
Her nickname is Alcohol Chungha which is the name of an alcoholic beverage brand.
Chungha is a former JYP trainee.
Hobbies: Watching movies alone.
Education: Sejong University.
She can speak Korean and English.
Specialty: Choreography, Dance.
Chungha is brave as seen on the show, they go to many abandoned / haunted places.
Practice period: 3 years 3 months.
Chungha appeared in Pentagon's Pretty Pretty MV.
She had a cameo role in the TV series Entourage alongside Nayoung.
Chungha sings the song Pit A Pat Strong Woman Do Bong Soon OST.
Chungha debuted as a solo artist with the song Why Don and You Know.
Chungha lived in Dallas, Texas for 7/8 years.
She revealed on Hit The Stage she almost quit dancing because of financial problems but she asked her family to allow her to continue because she was confident in it.
Company: M&H Entertainment.
Currently a solo artist: Kim Chungha.

• Sejeong (Rank: 2)
Birth Name: Kim Se Jeong (김세정)
Stage Name: Sejeong (세정)
Position: Main Vocalist
Birthday: August 28, 1996
Zodiac: Virgo
Height: 164 cm (5'5 ″)
Weight: 48 kg (105 lbs)
Blood type: AB

Biography, career and interesting things about Sejeong:
She was born in Jeonju, South Korea.
She has an older brother.
Her nickname is Uncle.
Hobbies: Painting, watching movies.
Education: Indeogwon High School.
Specialty: Singing ballad.
She participated in Kpop Star Season (16 years old).
Weakness: dancing (or rather, she's not good at memorizing choreography).
Sejeong appeared as a guest on the KBS Sound of Heart webdrama (2016).
Sejeong starred in the drama School 2017.
She was the MC for the 2016 Talents for Sale show and the permanent MC for Get it Beauty January 2017.
She has become famous in variety shows for her great personality and friendliness. She has appeared in TV shows such as The Law of the Jungle, Boat Horn Clenched, Mr. Baek The Homemade Food Master 2, Immortal Songs 2 (KBS), Yoo Hee Yeol's Sketchbook, Flower Crew (SBS), King of Masked Singer (MBC), Singing Battle (KBS), Boom Shakalaka (KBS) and many more.
The song '' Flower Road '' (produced by Zico) has reached number 1 on the Korean charts. She is the fastest solo artist to win a music show (Show Champion).
On January 12, 2017, Sejeong released the song If Only OST of the TV series The Legend of the Blue Sea.
Sejeong starred in Lotte Water Park CF with Astro's Eunwoo.
Practice period: 1 year and 11 months.
Company: Jellyfish Entertainment.
Current group: gugudan.

• Chaeyeon (Rank: 7)
Birth Name: Jung Chae Yeon (정채연)
Stage Name: Chaeyeon (채연)
Position: Vocalist, Visual
Birthday: December 1, 1997
Zodiac: Sagittarius
Height: 166 cm (5'5 ″)
Weight: 49 kg (108 lbs)
Blood type A
Instagram: @j_chaeyeoni

Biography, career and interesting things about Chaeyeon:
She has an older sister.
Her nickname is Daeng.
Hobbies: Mobile games, Movies
Strengths: Dancing, Aegyo, Ice Skating
She was born in Joryedong, Suncheonsi, Jeollanamdo, South Korea
Education: Seoul School of Performing Arts
She debuted in 2015 as a member of girl group DIA. She temporarily withdrew from the group to join Produce 101 as a trainee and returned after IOI disbanded.
In December 2016, she starred in the sci-fi drama "109 Strange Things".
She appeared in the SBS romantic fantasy drama "Reunited Worlds".
Chaeyeon starred in the webdrama "I am" (2017).
She was revealed to be the new face of jewelry brand Lamucha.
Practice time: 8 months
Company: MBK Entertainment
Current group: DIA

• Kyulkyung (Rank: 6)
Birth Name: Zhou Jie Qiong (周洁琼)
Stage Name: Kyulkyung (결경)
Korean name: Joo Kyulkyung (주 결경)
Position: Lead Dancer, Vocalist, Visual
Birthday: December 16, 1998
Zodiac: Sagittarius
Height: 166 cm (5'5 ″)
Weight: 47 kg (103 lbs)
Blood type O
Instagram: @ zhou_jieqiong1216
Subunit: I.O.I Sub Unit

Biography, career and interesting things about Kyulkyung
Her nickname is Joo Jae Duk.
Place of birth: Shanghai, China.
She has a younger sister and a younger brother.
Hobbies: Shopping, looking for beauty sites.
Education: Shanghai Conservatory of Music; Seoul School of Performing Arts.
Specialty: Dancing, Musical Instruments (Pipa, Guitar).
Strengths: Adapts faster than others.
Weakness: Thin ears.
Favorite group: Girls' Generation, f (x), After School.
Role Model: Nana.
Practice period: 5 years 5 months.
The members said that Kyulkyung looks like an ostrich.
She is easily scared when having to go to abandoned / haunted places.
Company: Pledis.
Now: She is a member of Pristin, but as of May 24, 2019 Pristin has disbanded.
Kyulkyung is a solo artist with activities in China, she debuted on September 9, 2018 with the song "Why".

• Sohye (Rank: 5)
Birth Name: Kim So Hye (김소혜)
Stage Name: Sohye (소혜)
Position: Vocalist, Rapper
Birthday: July 19, 1999
Zodiac: Cancer
Height: 163 cm (5'4 ″)
Weight: 48 kg (105 lbs)
Blood type A
Instagram: @s_sohye
Subunit: I.O.I Sub Unit

Biography, career and interesting things about Sohye
She has a younger brother.
Her nickname is Penguin.
Hobbies: picking up trash while she goes for a walk, collecting penguins.
Education: Kyunggi Girls' High School.
Specialty: Ocarina, Volleyball.
Practice period: 1 year.
Specialty: Beatbox, Acting.
Weakness: too emotional.
Sohye gets scared easily when having to go to abandoned / haunted places.
Model: Chun Woo Hee (actress).
Sohye has her own cafe in Korea.
Sohye is the host of Star Show 360 and currently MC SBS Game Show and EBS2 English Lecture Program teaches English students to prepare for the TOEIC exam.
She acted in a short film called Poetic Story.
Sohye guest starred on the webdrama Queen of Ring and starred in Unexpected Heroes.
In 2017, Sohye played the female lead in the drama Kang Deoksun's Love History.
Sohye also appeared in several music videos: The Ark - "The Light", Jinlin Wang - "Goodbye School", Ra.D - "Look Into Your Eyes".
Company: Shark & ​​Penguin Entertainment.
After IOI's disbandment, Sohye joined SBS Power FM Bae Sungjae's Ten Radio as a fixed member.
She acted in the TV series Best Chicken (2019).
Currently an actress: Kim So Hye.

• Yeonjung (Rank: 11)
Birth Name: Yu Yeon Jung (유연 정)
Stage Name: Yeonjung (연정)
Position: Main Vocalist
Birthday: August 3, 1999
Zodiac: Lion
Height: 167 cm (5'6 ″)
Weight: 52 kg (114 lbs)
Blood type A
Instagram: @uyj_s

Biography, career and interesting things about Yeonjung
Her nickname is Cider Vocal.
Hobbies: Playing alone.
Place of birth: Seoul, South Korea.
Siblings: an older brother.
Education: Hanlim Multi Art School.
Practice period: 1 year and 3 months.
Company: Starship Entertainment.
Current Group: Cosmic Girls.

• Yoojung (Rank: 3)
Birth Name: Choi Yoo Jung (최유정)
Stage Name: Yoojung
Position: Lead Rapper, Lead Dancer, Lead Vocalist
Birthday: November 12, 1999
Zodiac: Thien Yet
Height: 157 cm (5'2 ″)
Weight: 44 kg (97 lbs)
Blood type O
Subunit: I.O.I Sub Unit

Biography, career and interesting things about Yoojung
Her nickname is Wink Fairy.
She doesn't have any siblings.
Hobbies: Dancing, Drawing, Photography.
Strengths: she rapped and wrote her own lyrics, covered boy group choreography.
Education: Seoul Music High School.
Special: Sleep everywhere.
Weaknesses: Slow to open doors to strangers, Sleeps everywhere.
Yoojung gets scared easily when having to go to abandoned / haunted places.
Yoojung can imitate an orangutan.
Favorite Group: 2NE1.
Role Model: Rihanna.
Practice period: 4 years and 7 months.
Yoojung appeared in ASTRO's 'Breathless' MV and the movie 'To Be Continued' by ASTRO.
Yoojung and Doyeon joined the Idol Fever webdrama.
Yoojung said that if she were a guy, she would date Chungha.
Company: Fantagio.
Current group: Weki Meki.
Yoojung's ideal type: Park Haejin, you especially like him in The Cheese in the Trap, a man who is a musician.

• Mina (Rank: 9)
Birth Name: Kang Mi Na (강 미나)
Stage Name: Mina (미나)
Position: Lead Dancer, Vocalist, Rapper
Birthday: December 4, 1999
Zodiac: Sagittarius
Height: 162 cm (5 ft 3¾ in)
Weight: 48 kg (105 lbs)
Blood type O

Biography, career and interesting things about Mina
Her nickname is Juice Girl.
Hobbies: watching movies, traveling alone and playing games.
Education: Seoul School of Performing Arts.
Special: Waacking Dance.
Mina and Doyeon have the exact same birthday (day, month, year).
Practice period: 1 year and 1 month.
Company: Jellyfish Entertainment.
Current group: Gugudan.

• Doyeon (Rank: 8)
Birth Name: Kim Do Yeon (김도연)
Stage Name: Doyeon (도연)
Position: Vocalist, Visual
Birthday: December 4, 1999
Zodiac: Sagittarius
Height: 173 cm (5'8 ″)
Weight: 50 kg (110 lbs)
Blood type O
Subunit: I.O.I Sub Unit

Biography, career and interesting things about Doyeon
She has an older sister and brother.
Her nickname is Little Jun Ji Hyun.
Hobbies: Watching movies, Listening to music.
Education: Wonju, Gangwondo, South Korea.
Strengths: Dancing, the Queen reacts.
Weakness: The queen reacts.
Doyeon is brave as seen on the show, they go to many abandoned / haunted places.
Mina and Doyeon share the same birthday (day, month, year).
Doyeon and Yoojung joined the Idol Fever webdrama.
Practice period: 1 year and 5 months.
Company: Fantagio Entertainment.
Current group: Weki Meki.
Doyeon's ideal type: Park Seojoon. She said she really liked his character in the movie She Was Pretty.

• Somi (Rank: 1)
Birth Name: Ennik Somi Douma {Jeon So Mi (전 소미)}
Stage Name: Somi (소미)
Position: Lead Dancer, Lead Vocalist, Rapper, Face of the Group, Center, Maknae
Birthday: March 9, 2001
Zodiac: Pisces
Height: 169 cm (5'7 ″)
Weight: 48 kg (105 lbs)
Blood type O
Instagram: @ somsomi0309
Subunit: I.O.I Sub Unit

Biography, career and interesting things about Somi:
She has a younger sister.
Her nickname is Vitamin.
Hobbies: Gathering Socks, Shopping, Walking Alone, Find good songs, Find delicious restaurants.
Education: Seoyun High School, Hanlim Arts High School.
Specialty: Taekwondo, caricature, cooking.
Internship time: 2 years.
Somi can impersonate a eating giraffe.
Somi is easily scared when having to go to abandoned / haunted places.
She holds a level 3 black belt in Taekwondo.
One of her childhood dreams was to become a flight attendant.
Somi appeared in GOT7's MV Stop Stop It.
Somi also appeared in Up10tion's White Night MV.
Somi is a big fan of 2NE1 and her role model is Minzy.
Somi is the MC for Idol Likes Battle ep. 3 (cameo GOT7).
Former contestant of SIXTEEN.
Somi is close friends with Chaeyoung and the other members of Twice.
Somi is close friends with Umji of GFRIEND, Daehwi of Wanna One and also friends with Park Woojin and Kim Donghyun who were trainees of JYP.
Company: when she was in IOI, she was under JYP Entertainment, but then she left JYPE.
After IOI's disbandment, she appeared in various shows, such as Sister's Slam Dunk Season 2.
Somi, along with six other female idols, on the Idol Drama Operation Team TV show, they created a 7-member girl group, called Girls Next Door, which debuted on July 14, 2017.
On August 20, 2018, Somi left JYPE.
On September 23, Jeon Somi signed with The Black Label (a subsidiary of YG Entertainment led by Teddy).
On June 13, 2019, she debuted as a solo singer with the single Birthday.
Currently: Solo singer Somi

Source: Kprofiles.com