AH! i'm so sorry i didn't see this earlier lol i'm assuming this was sent bc of me saying sangsungz are sort of cut from the same cloth that one time... it's hard to put it into words but i guess i see them taking on similar roles in the context of the whole group. i think it is a combination of their age positions (being the oldest two) and their own personalities. i guess to me it feels like they both have a very keen awareness of what's going on at all times... they're both always keeping close tabs on everybody in any given moment, they just tend to break out of their observant states and surge into action for different reasons/in different ways