ochi hates fakku with a passion and goes out of his way to always (always) attempt to accidentally kill him. usually succeeds.
fakku doesn't quite pick up on ochi's murder attempts and often gets killed by him is an idiot and loves him
ochi loves to torment nemu with facts and the like, he treats him the same as he treats any old pleb
ochi is neutral towards satsumaimo, he does exhibit signs of being somewhat afraid of him tho.
sai aku is repulsed by maimo. that is the only person he isn't attracted to. since their always together, they're like siblings, but not in a good way. sai aku hates satsumaimo a lot, but he does break down when he's away. still claims to hate him !!
satsumaimo hates sai aku, despite always being with him. they have a sort of bickering-siblings vibe, which satsumaimo doesn't have with anyone else. whether maimo's hatred feeling towards sai aku is genuine or not....no one can tell