- Stage Name: Kai (카이)
- Real Name: Kim Jong In (김종인)
- Nick Name: Kkamjong
- Birthdate: January 14, 1994
- Height: 182cm
- Weight: 65kg
- Bloodtype: A
- Skills: Dance (ballet, jazz, hip hop, popping, rocking)
- Chungdam High School (Previously)
- School of Performing Arts Seoul (SOPA) (Graduated)
- Krystal (f(x)) (2016-present)
- Agency: SM Entertainment
-  SBS To the Beautiful You (cameo)
-  LINE/Naver TV Cast EXO Next Door (Web Drama)
-  Choco Bank (Web Drama)
-  SBS 10,000 hours (with Taemin & U-Know / YUNHO)
-  SBS Running Man (with Se Hun)
-  Mnet 4 Things Show
-  Arirang After School Club (with Baek Hyun)
- [2012.10.30] Younique Unit - Maxstep (Eunhyuk, Hyoyeon, Taemin, Henry, Kai and Luhan)
- [2014.08.18] Taemin - Pretty Boy (#4 Pretty Boy (feat. Kai))
- He was cast into SM Entertainment after winning the company's Youth Best Contest in 2007.
- He was inspired to be a singer when he saw legendary group Shinhwa perform on TV. He asked his dad what kind of dance they were dancing and he replied “That’s a performer’s dance”. From then on he began to pursue the career as a performer.
- It has been said that the EXO members cannot help but get bossed around by him when it comes to dancing, and only Taemin can control him.
- His ideal type is a girl who kind and gentle.