And here they are.

I've made some changes in Ramon and Alex (3th and 4th), and Tania (1th) gets to keep her design because she was basically the only one working from almost the get go. Ramon is now a centaur's descendant instead of a faun (it wasn't working the way he was). Alex is still a mermaid.
Also, Zak (2th) can float/fly because banshees can float/fly. Surprisingly enough, vampires can't unless they're in their bat form.

I have to design a bat form for Tania.