I like virgins but would not make much sense Bella being a virgin, but at the same time she doesnt seem to be fucking around either...one because shes hard to deal with and probably scares the guys around her, and she seems to be picky.
The ones i can see as virgins are Nami, Vic, Sasha, Sonia and Nadia.
Bella is not as Ocean said and Milla already said she wasnt IIRC.
I dont think Ayua and Zara are virgins. Nia and Vanessa obviously arent.
Robin im a bit on the fence, i dont think she is a virgin but would not be weird if she is.