Yay Anaïs! I don't have any new muses yet, but if I do decide to go for one of the new students I might pick up Filipa again. She and Anaïs didn't get much chance to interact, so that could be fun. We'll see, though.
Anyway, in terms of the muses I do have, I think with all of them it's a matter of seeing how things evolve in game. Cormac likes the idea of a tall athletic female with Gryffindorian tendencies (but then again, just the fact she's female would be enough to keep him interested). There's no use reminding him he's only 15 and way too immature for someone like her.
Hamish will be nice since she's clearly a "sane" girl. They can talk Quidditch.
And Samir is... well, Samir. He'll be loud and cheerfully nice, as always. And given her hobbies, she's bound to find him in Choir and in the Art/Fashion clubs.