I'm certain that Kuzumi has ASD at this point
-Highly Intelligent and Excellent Academics
-Poor communication skills, doesn't speak or look people in the eyes very often
-Uses Headphones, which is common for people with Autism because of Sensory issues
-Doesn't have very many friends and doesn't interact with very many people
-Doesn't pick up on social cues as well, such as the end of the game or how people think of that guy as dangerous
-Niche interests that are of extreme focus, in his case, his obsession with birds