if saiko has a (serious) fight with murata or yokota: not too worrying. murata will forgive quickly, saiko will believe himself to be showing incredible goodwill when he lets it go after getting his ego ever so slightly stroked (hiding that he really wants to make up). it happens often enough with yokota that after a certain point they just agree to get over it without ever mentioning it so theyll just randomly be friends again like a day or two after. with either of them they kind of just have to wait it out for a bit and its fine
saiko has a fight with takahashi: now this is more worrying because takahashi is genuinely saikos best friend and load bearing $quad member. their first fight was not taken seriously but they have learned since and now efforts are made on all sides by all members (yokota and murata included) to make things right. yes you heard that right saiko makes an effort.
takahashi has a fight with yokota: overall inconsequential when it comes to the group dynamic. they can just do duos until its over like its fine nobody gaf
takahashi has a fight with murata: a little bit more serious but theyre family friends above all else so their moms have it sorted that very evening.
yokota has a fight with murata: friendgroup explosion. it doesnt get treated with the same urgency as a saiko-takahashi fight and that is a mistake. absolutely NASTY atmosphere. and it lasts a long time too because even if TK and saiko try to help well they dont listen to takahashi and saiko only has shitty advice (no experience). thankfully they very rarely fight.