What's Okay To Mention Around Him: You can talk about just about anything with chaos. He's a very patient person and is aware that there are other worlds and dimensions out there. If you ask him about himself, he'll wheel the conversation onto other topics but he doesn't have any sore spots to speak of.
Abilities: chaos at first seems unremarkable in the special abilities department. While he has an undeniable aura of "Not Us" about him, he never flaunts his power. When he has to, however, he powers down his limiters enough to draw energy from his wings. chaos's aurabending can destroy summons in a touch and is very effective against anything with a soul. Beyond that his powers are unspeakable. His special ability, the one he was emanated into existence to possess, is currently sealed and inaccessible. If you piss him off he can turn you into a pillar of salt or thinly laminate you to a wall with blasting heat. Luckily angering chaos is very, very, very difficult. He will smile at you and talk to you about your feelings long before he'll feel motivated to attack. chaos also has an innate ability to sense things about people that they might rather have kept secret. But he honors secrecy and would never bring anything he's discovered up unless he really, really felt it was necessary. All in all, DDD probably won't see much, if any of this. I don't powermode, chaos doesn't either. I just mention it in case it ever does come up.
Abilities that may actually be shown in game: chaos's aurabending and superhuman strength is seen in combat in
Xenosaga. Once he recognizes the diversity of races here at DDD he'll probably open up with those skills more.
Notes for the Psychics:
There is a powerful psychic blockade here, preventing psychics from entering chaos's mind. But there is a detectable aura of sadness around him.
Can I shapeshift/bodyswap/spit at/step on/etc?:
For crack events: Yeah, he'll probably take part. Just ask first. :D For violent touching...You are welcome to do so but he may not react much beyond looking sad for you. Bodyswap is probably a no, given his powers and the fact that the aurabending can go through his skin (he does the most damage bare handed). As for badtouching? Well, if you insist. He'll probably just shrug you off.
Hugging/Kissing/Other non-violent physical contact:
chaos isn't overly tactile but he's very patient and kind. He won't mind being hugged. Even if it's another guy. chaos has a female Other but age and wisdom means he doesn't get upset about such "trivial" things.
Maim/Murder/Death:
Uuuuhhhm. chaos would probably destroy anyone trying to do that much damage to him or a loved one. Excuse me. LIBERATE anyone trying...But you CAN try. Death is technically impossible. Technically.