Seeu has very long, bright red hair. He starts out wearing it in a high pontytail, but as the story progresses he begins to wear it down more often. He is described as tall. His eyes are most often colored red, though they have been colored a shade of violet. He wears a solid black outfit with some sort of cape/armor over it during battle. He's apparently androgynous, since one character stated that they had to take a close look at him to determine his gender. He's also described as having an inhuman aura.

When he was younger, he wore his hair shorter and wore (presumably) white robes. His eyes were much wider then, and he looked a lot like a doll to me. ^^; He also seemed somewhat short too. He generally looks expressionless, though sometimes he can look upset when he's freaking out (you know, those moments that earn him the title "Mad Prince"). Overall, he's a very attractive character.