Well, to begin, he has silver hair, and ice blue demonic eyes. He's a flirt, and the most powerful being in the human world.
Dante is a red half-demon. He's tall, muscular, smart, hotter than all of hell, careless, reckless, fearless. Ummmmmmm...lets see what else. He has a collection of demon souls that he can use as weapons, he owns his own demon slaying business, and he loves pizza. (who doesn't) He has an identical twin, he likes rock, he always wears red, and he has a big a$$ nose.
Well, to make a long story short, Dante is just all that. There is just too many things you can use to describe Dante.