>>53423866natsume is... unhinged, talks in a very weird way (Good afterNOON, Little KitTEN.), kinda schizophrenic (he's a fortune teller). he's sweet to his closest friends but has a cold exterior.. he knows how to make bombs and tried blowing up yumenosaki once. (lol)
he also... uh.. has violent tendencies...
ritsu is a sleepy boy with brother issues.
they're literally nothing alike.. maybe the aloofness but that's about it.
suityan is probably having a natsume moment because of the oddballs return. (natsume, shu, wataru, kanata and rei, ritsu's older brother, a massive brocon)
https://ensemble-stars.fandom.com/wiki/Natsume_Sakasakiin case you or anyone want to read about his personality.