[OOC]
Backtagging: I backtag like a boss and love it as if it were my own child.
Threadhopping: Go for it. If it looks like you'll be interrupting a Deep and Serious Discussion, maybe ask first?
Fourthwalling: Fine by me, Yukimura will just think you're odd.
Offensive subjects (elaborate): None, really, I'm up for whatever as long as you ask me first about anything too extreme. I'm not down with slurs or hateful language, though, unless it's very IC for the character using it.
[IC]
Hugging this character: Yukimura's not likely to initiate that many hugs, but he has no problem accepting and appreciating them.
Kissing this character: Yep, it's cool. Yukimura is a pretty chill dude, he'd probably be surprised and flattered rather than upset.
Flirting with this character: Again, totally okay, Yukimura will either troll flirt back playfully or smile and completely ignore it, depending on who's doing the flirting.
Fighting with this character: Uh... ask first? It's pretty unlikely that Yukimura will get into any fights.
Injuring this character (include limits and severity): Light injuries are fine, he's an athlete and is used to them, but his team might hold a grudge. Anything that would take awhile to recover from, please ask me first.
Killing this character: Uh, no.
Using telepathy/mind reading abilities on this character: Tennis.
Warnings: Yukimura is very mature for his age, but he's still only 15, so... keep that in mind. He has a team of wacky misfit tennis players who are (really really) devoted to him, some of whom are in game, so if you want to punch him in the face or something, be warned that they might not take it well (and conversely he won't be happy if something happens to them). Also, unless your name is Echizen, he can kick your ass in tennis.