Yaochen! He was a trainee along side with the rest of the skz members too! (he was in the line up to debut together with skz just like allen from cravity and john(the friend who gifted chan the bracelet in australia) but i heard they dropped out before the initial thing~

Yaochen is still with JYP though, just under JYP China! 3RACHA made a song for him too and they are all close but yaochen is especially close to Chan 🥹 They used to be roommates too and they talked about each other a lot during concerts