Girls is about to crash her own party, gg.
Plot aside, Mami is still number one in my eyes. She's pretty clearly got some personality problems, but her whole breakup and stuff after that has been to get mc to notice her and be jealous of her - but she's being reasonable about it all, she isn't just going around ruining lives like so many exes do. Ruka claims to be playing the long game, but Mami has the patience and strategy to actually pull it off. Of course, if she wasn't shy, and mc wasn't too self-deprecating and thoughtless, he could've called her out on her crap and they woudn't have broken up in the first place....