A couple actually... not gonna mention names or link the series. Just gonna drop clues...
up to you to guess...
They're all stacies... 
1) Rejects Chad or at least gave Chad a hard time. Not even sure if she likes men. Female strong silent type.
2) Liked a Chadlite who died early on. A lot like my OC Claudita in her behavior except on a shorter fuse and more immature.
3) She has a stalker jealous obsessive attitude towards a certain Chadlite whom she severely status mogs. She will kill herself if she doesn't get him. Not sure if she's the villainess.