Words famously said by Noah right before he flopped down on the floor.
10, soon to be worthless (#satire), English pounds on it being snot bubble guy.
It's floppin' time!
At least Noah doesn't bleed when doing that, right Gazz?
It's gotta be the one with the biggest hair. That's how it always works.
Well, that doesn't narrow it down much...
The guy in panel 3 has spiky hair and piercings. Either him or the room itself is magical.
By anime logic, it's the strangest hair, not necessarily the biggest. Green hair back there is likely the magic user.
Green Hair def looks like an elf.
The green haired punk girl definitely looks like an elf, but maybe she's just a decoy for the real player?
Also, I still think that the actual magic source, be it a person or not, is quite dispersed in this room.
It's not a kid- it's the room itself. The whole thing is an illusion or something.
It's entirely possible that there's something magical about the room itself.
But, presuming someone is hiding Felix style, I suspect one of the girls, as the magic user who signed up with the graffiti artist as a child, Chernyl D'Aryl could be right there.
If I had to focus on a single candidate, I'd pick the blonde girl.
Worst case, it's all of them (possibly with the room serving as a mask).
Because of course dropping to do the worm/break dancing is obvs what happens when your magic goes out of control.