Regius's human form is also built sturdily, with a strong jaw and square shape to his face, much like his brother's only with more force and regularity to his features. He is proud enough of his body to keep it in fairly good shape. His skin is pale, silvery-white, with only a faint tinge of pink to prove he isn't just a marble statue come to life, and his straight hair vibrantly red. His eyes remain their stunning silver shade through the shift. In human form, he might not exactly be vain, but he does tend to choose clothing that suits his coloring and build, and is a good fit. 

A habit that quickly becomes a familiar one to those who know Regius is the amused eye-roll: he has a kind of superiority to his personality that shows him the world and his fellow creatures through amusement-tinted glasses. Vir went and fell on his face again? Shrug, eye-roll, and smirk... and then go help him up: that's just the way Vir is, after all. And so it will be for anyone and everything else: he's very open-minded and accepting, on top of eternally amused. That doesn't mean he won't tease Vir mercilessly for his apparent clumsiness and bad luck, but he still readily accepts and understands that it isn't about to change, and he'll do what he can to help his brother out out. 

Though he is easily amused, in a superior sort of manner, that doesn't mean he doesn't care about other people; he just happens to find them funny. In particular, despite his teasing, he cares quite a bit about his brother Vir, and he's surprisingly attached to his two mothers. The few things that spur him into actual effort in his studies are a desire for Ketvia's approval in particular, and to help out Vir. He doesn't have a lot of friends, otherwise, being slow to warm to other people, but once he finally starts making them, he'll probably be just as loyal to them-- and just as likely to tease them for their shortcomings.