Also, yes, Keisuke is very unnerving. Personally, I think he's poisoning the people around him.

But this is something I've always appreciated about the Persona series: reasonably diverse social links. Mishima is a loser and the game leans into it. Keisuke is an unattractive nerd with a chem lab in his basement. Nozomi is such an anomaly that Minato Kosuke deliberately breaks the social link just so he can ditch him. (If you haven't done that one yet, I wholeheartedly recommend it; it is spectacular.) Ayane is... idk, actually five years old and kind of creepy. Mutatsu is a walking bag of wrinkles. The fox is a fox, etc. It isn't just classy, attractive people.

Now if only they knew how nurses actually dress for work!