So, there's this oct starting up on twitter, and like the responsible adult I am, I'm going to take a crack at it. Why not?

Info I couldn't fit onto the ref sheet that's still important:

Aayu is pretty much immortal. But all that means is you can rough him up a lot, and given time he will regenerate. Of course the worse the wound, the longer it takes, and immortal does not mean immune to pain/fatigue/hunger when he's outside his realm.
Basically, don't be worried about being hard on him, he can take it. Other than that he's pretty much human. break a leg or arm, shoot him, he'll go down.

No superhuman speed or stamina, in fact, due to experiencing time for the first time, Aayu is likely to suffer severe surprise when he's actually hungry or properly tired.

Speaking of, some small facts about his home: Time does not move there. It's always daytime, around noon. This allows Aayu to access the strings whenever on their timeline he needs. So he doesn't age, doesn't need to sleep or eat, and so on. Of course he does eat, he quite enjoys food actually. One of his favorite things to offer visitors on the rare occasion they drop by is lemonade he makes fresh.

Aayu is the brother to City ( https://www.deviantart.com/darkkits.....tref-471933955 ) but City does not know he exists. She cannot remember him any more than any of the citizens she watches over can. Her son Heart can though, due to his father being from outside Aayu and City's Canon.

Aayu loves his sister very much, and Heart as well. Even if he only gets to see Heart on occasion. He is deeply protective of them, and of the worlds he keeps an eye on.

For all that Aayu can and will cause problems on purpose, and be an ass to people for fun, he has a soft spot for kids. He will keep his teasing to a minimum with them. He's a jerk, not a bully.

If you have any other questions about him, please feel free to ask me!