Seijin shuffled through the school gates along with the rest of the students, lazily rolling his eyes in exasperation at the scene put on by the more vocally inclined members of the group. "Ma ma. Why couldn't you all be less rowdy and provoking in general? And it's on the first day of school, can't we all ease down a bit? A waste of effort when you can be going along with the flow. Besides, try as you might you'll just end up being put in your place eventually." His straight off-the-top-of-head statement was accentuated by a loud, drawn-out yawn before suddenly blinking as a moment of realization fell upon him, his air-headed nature having been brought out to play.
"Oh did I say that all out loud? Well, I– ow." Seijin grumbled out in mild surprise as he was cut off by a sudden burning sensation on his back, he turned around to look at whoever just decided to burn him for no particular reason. Only to found an innocuous-looking, short girl, wearing a blouse of all things in this weather, with flames for hair bowing her head down while apologizing and offering to recompense him for his jacket. "Ayy settle down Torchhead-san, it's only my favourite jacket that yah burned," he chuckled while dismissively waving her off, already taking said jacket off before trying to dust it off. "I really can't be bothered to put someone through the ground on the first day, and the same for holding grudges. So let's laugh on this lil' incident and forget about it. Okay? Okay."
The blonde teen blew the mishap off on the spot, patting Elina on the head without thinking to further emphasize the whole levity of the situation, only to have his hand slightly singed for his troubles. One hand in pocket and the other holding his burnt jacket over his shoulder, he made back off with the rest who were now slowly filling the assembly hall. Not bothering to think too hard about where he chose to sit, he ended up grabbing a seat in the middle of the room before folding up his jacket into a makeshift-pillow to use for when he'd nap during whatever thing they had prepared for the new class of students. Seijin decides then that it'd be the perfect time to have that nap.
Seijin's airheadedness shows with his lack of head-to-mouth filter, he shrugs the whole 'randomly getting burned' thing off and decides to take a nap in the assembly hall.