Ranzes would be a good very caring protective uncle as he has experience with kids and absolutely loves them
Sasha would be a great and fun to be with babysitter, as he's a bit of a goofball and likes playing all sorts of games and do fun activities
Rafus, as he may seem like a douchebag actually has a son of his own so he sorta knows how to take care of kids
Fel doesn't usually like children but they'll absolutely love her once they'll see her