the squad members: gfriend's sinb and umji, astro's moonbin, seventeen's seungkwan, imfact's ungjae and the ark/uni.t's suji
some of their interactions or more like sinb making moonbin her punch bag
moonbin mentioned sinb and seungkwan
you can tell they're friends
umji talked about the yogobara ep with sinb and moonbin. she called moonbin as binnie

suji, sinb and umji interactions at music core