- Hyunsuk was a trainee for 3 years.
- His nicknames are Ddaeng, Jelly-Hyun, and Purple Boy
- He has a younger sister and a younger brother.
- He collects lip balms.
- His favourite colour is Purple.
- Emojis: 💜🔥💜🔥
- His favorite things are Fashion, Football, Hip Hop, and Songwriting.
- His inspirations are Zico, Suga, Bobby, GD, B.I, Mino.
- He composes songs.
- It was his dream to debut under YG Entertainment.