Saito Kinsei is bad at talking to people, but he's good at languages. He's bad at standing up for himself, but he's good at remembering things. And he's bad at getting to places on time, but he's really, really, really good at artificing, and for the Scholomance slot tests, that's what counts.
His affinity is for light, say the divinations, but it stretches. Kinsei fixes radios, and the glowing spots in his vision like fireflies don't distract him much. His eyes are very large and very pale and he doesn't like when other people make eye contact and he's weird and wrong and awkward and shy but he's good at radios, if not at most other things, and he's good at languages, and he's good at making things like him even though he's bad at it with people, and for the Scholomance, that'll have to be enough.