Han, also called the Squirrel by his member, is the rapper of the group. He can also produce songs.

He was born in Incheon, South Korea and used to live in Malaysia. He has an older brother and has a puppy, named Bbama. He trained for 3 years.

He is in pre-debut group/sub-unit 3RACHA with Chan and Changbin. His stage name in 3RACHA is J.ONE. He can play the guitar. He prefers lyrical and melodic type of rap. He likes drawing and horror movies, His favorite season is winter.