The harem list right here is official. There will not be any changes here.
X-23 (18 yr-old)
Gamora (Earth terms, looks 23ish)
Rogue (19 yr-old)
Storm (25yr-old)
Black Widow (I'm taking a little liberties here and going the route of a young Black Widow, soooo 23ish.)
Spider-Gwen/MJ/Black Cat (package deal here because they go to the same school, all three are 18 and go to school with mc)
These are my personal favs, X-23 being the one with the most story potential. Because these are my personal favs, requests for the harem won't be taken. Story itself and suggestions for powers are still welcome though.