Toshiro Hitsugaya is captain of division 10 in a very popular shonen manga called Bleach. He is one of its most popular characters because of his cuteness and sarcastic personality.
Please please do not call him hot. He looks too young for that... and he's way shorter than Momo and Rukia... ignoring the silver hair, he looks like he's Karin's age, which is 11.
Hitsugaya's assistant captain is the big-boobed Rangiku Matsumoto. His seriousness is contrasted by her airheadness. He's close childhood friends with Momo Hinamori (assistant captain of division 5) and overly protective of her.