Haruko is more homely than the others, sure, but even then I found her sort of charming in her own way. That pink line art of her is incredibly unflattering, though. I think it's the nose and the fact her hair doesn't seem to tuft up like it does in the actual show.
Haruko can be cute. She needs to get a proper fitting uniform, start wearing a hairband or something, let her hair grow out a little so she can keep that messy and spiky Satori-like look, and LET A PROFESSIONAL CUT HER HAIR.