You know, rereading this I just realized they all are technically pole sisters since the original MC was with the two friends but then it was revealed that he was with Ichikawa as well back in his old world.
Apologies since it's been a while but why is the fat dude being respected by everyone? Like is it a cult thing? Because he doesn't has his memories right now, correct? Or, they're just afraid of the dude getting his memories back.