One thing has genuinely bothered me for almost 20 years because I have not read a single answer. How the fuck did he enroll in Gekkoukan High? The game implies he manifested just a few nights before, after you you meet him as Pharos for the last time. How did he get clothes, documentation, etc.?

>Kirijo group did it lol
Nothing implies they know shit about him, maaaybe Ikutsuki could see it coming but he why would he prepare all that shit if he plans to kill everyone before that

>he always existed as a regular dude and just awoke to being Death after the last shadow died
He's off as fuck and it is implied he has no home or whatever and just disappears at sundown

>all of fucking reality shifted to magically just write his name in the Gekkoukan roster
Nothing in P3 suggests he has these powers but frankly this is the only explanation that makes sense