WDYT OF THIS NAME FOR A GIRL?

Juliet Valentina is STUNNING!!! I can definitely picture it on a person with the description you gave. Valentino is a bit too extravagent, almost ultra feminine, which isn't a very good association for a man. It's also very Italian, so if the character isn't Italian, I'd shy away from it. It makes me think of an extremely flamboyant Italian model...