Not sure if you meant for Enstars or Alcstars but I'll answer for both. (Disclaimer: This is not meant to insult or upset anyone who likes these characters. This is just my silly opinion and you are allowed to like them.)

Enstars: Shu. I don't exactly hate or strongly dislike him but I tried my hardest to like him yet he honestly couldn't grow on me. He's just really not my type. (I've had some personal experiences as well too...)

Alcstars: Victoria, but Connolly is a VERY close second. I could write a short essay why but I'm sure no one wants to hear it lol.