Giving you a bit of a wild card, but Edward Elric for the character ask game with 4, 9 and 12!
4. If you could put this character in any other media, be it a book, a movie, anything, what would you put them in?
Tbh? Putting the guy used to punching his problems into any series where people use other things to solve problems would be HILARIOUS. Put him in Pokemon. Tell him he’s not allowed to punch anyone in the face, that’s what these little critters are for.
He’d go insane.
9. Could you be roommates with this character?
Uh… I don’t see why not. He’s pretty chill, albeit chaotic, provided you don’t make fun of his height xD
12. What's a headcanon you have for this character?
This is a hard one because I don’t think about this series as much as I do Mega Man xD
But if I had to choose something, I’d like to think that he chose to wear red for his signature coat because that was his mom’s favorite color… (Note, Trisha does not have a stated favorite color anywhere in canon.)