Character name: Casper LeBlanc Jr.
How good-looking are they? Plain. He's not pretty by nature, but he doesn't have any obvious scars from a first glance, at least?
How do they dress? Generally wears a hoodie, beat up jeans, and a pair of beat-up sneakers. Without the hoodie, he's got on a t-shirt, usually. It's either plain or has some sort of nerdy saying on it.
What's their personal grooming like? Doesn't bother to style his hair at all, but he does at least keep himself fairly clean. He doesn't smell weird anymore, at least.

Character name: Naoya
How good-looking are they? Explicitly called out in his cousin's thoughts the narration as being 'handsome'. He's got a very angular face, but he fits 'white haired pretty boy' with red eyes really well.
How do they dress? Tends to wear this weird matrix-haori thing over a blue shirt and dark pants, along with geta because he's a nerd. Otherwise it's dark pants and a lighter shirt in general.
What's their personal grooming like? He keeps himself very clean. He's not like those other programming nerds. :|