I guess Odaril would be my teacher in anything that's related to mapping, after all we mainly talk about that when we chat together
Nashmun is definitely my Taiko-sensei, and when it comes to standard... I don't really know. Between Elysion, Odaril and Kanna, I really have no idea. Sushi's my pop'n music teacher, I'd say.
As for rivals, JJ claims to be mine. I used to have Sarys, but he drifted off to the dark side. I guess Noob Man would be a good one, though kinda awkward since he's got the ranks, and I've got the skill, but hey. Otherwise, and once again, definitely Odaril. Though he wouldn't consider me as one, I'm sure.
As for actual family... I consider #french like a big family, that's about it really. :p