▶ VISUAL: Before you ask, yes, he's pretty much always wearing that same striped shirt. He's 5'7" (170cm) and quite lean. Think your typical white-haired pretty-boy's build. He also has ridiculous eyelashes, and sometimes striped nails. Something to note is that he's frequently described as a man, and not as a boy, so he presumably has the physique of an adult...presumably...
▶ AURAL: Takahiro Sakurai! Speaks evenly and fluidly, not modulating a lot.
▶ OLFACTORY: Nothing, which is the weird part. Do Septentriones even have distinct scents? Probably not. He'll simply smell like whatever environment he's in at the time.
▶ DEMEANOUR: Calm and collected in nearly every situation, with a straight posture. Sometimes has a hand in his pocket, and puts his fingers to his mouth while thinking.

▶ PHYSICAL AFFECTION: Sure! He himself doesn't mind patting heads or putting his hand on someone's shoulder for comfort, or even getting up close and personal in order to wipe stuff off their face. When on the receiving end of physical affection, he'll freeze up a little (since he's new to this sort of thing), but will ultimately accept it.
▶ PHYSICAL VIOLENCE: Sure thing! Just a warning though, he's not considered a sword of the absolute for nothing.
▶ RELATIONSHIPS: He's a newbie to this, but he welcomes the opportunity to make them with open arms! It's difficult to get him to hate you, as his patience is pretty much endless unless you hit some of his berserk buttons. Once you've earned his trust, he'll do anything for you, including dying. As for romantic/sexual relationships...he's not capable of either of those, unfortunately, although his...wording, social awkwardness, and general demeanor might awkwardly give people the wrong idea. (Which I welcome.)
▶ PSYCHIC & PSIONIC INFORMATION: Anyone who tries to read his mind is going to be in for a trip, since he doesn't process information and time the way humans do, plus all of his thinking is done in Septentrione (alien) language, so please contact me first.
▶ MAGICAL INFORMATION: Very powerful, since he's not human at all, and anyone with a sixth sense can probably tell he's neither demon nor angel or any kind of spirit, but something else entirely. However, this goes both ways: he can tell if your character isn't human, a demon, angel, alien, etc. For species he doesn't know, it'll just register to him as "something supernatural".
▶ MEDICAL INFORMATION: Again, not human, so his biology isn't human, he has literal space for his insides, and like his kin, has a core for a heart. For a Septentrione he's...healthy...?
▶ OFFENSIVE SUBJECTS & TRIGGERS: None at all.

▶ BACKTAGGING: Please do! Depending on my work schedule, I usually reply once a day, so this is basically how I live.
▶ THREADHOPPING: As long as it's not locked or anything, go for it!
▶ FOURTHWALLING: Preferably no, but ask me first.
▶ OFFENSIVE SUBJECTS & TRIGGERS: None.

▶ ANYTHING ELSE? Nothing at the moment!