I can't speak for Veloran, but glasses are a fairly popular fetish in Japan, and an option in many of their games that focus on the characters' sex appeal- Dead or Alive, for instance. You wouldn't say that all the female characters in that game have Bayonetta-themed costumes, would you?
Black pants are black pants- we all like black pants, don't we? Doesn't Trish already wear black pants? I think you guys are grasping for straws- our familiarity with the characters and the fact that they share a genre is introducing too much bias.