Childhood friends it is then :D Fritz usually hangs out in Monoceros because he loves being up on the edges. He'd be totally willing to help Romeo out with his musical ambition since he loves to please others, the only problem is that if Romeo ever wanted to confide in him with serious things or something that isn't as entrancing as singing, Fritz may 'lose interest' and considering Romeo likes the audience, he may not take that very well. Especially if he really needs the support during that time.
Also there could be stuff around the fact that they're both pretty small creatures in comparison to a lot of the larger, stronger characters (including powerful scary hybrids, aa) so there's always the fact that they feel, although they've got strong, excitable characters, it takes them a lot to be a part in what's going on.
@Romeo