I'm up for keeping that sort of thing with Lust and Greed! She'll probably end up being equally parts snarky and protective in this case, because she doesn't really do empathy or love.
I don't think Urania is very interested in sex or romance, but he is totally welcome to have a thing for her! He can sit up with her late into the night while she tells him star facts. ("You should write a space play. Put them all on a starship, Will.")