Despite his rough exterior, Aizawa cares deeply for his students. He is fiercely protective and will go to extreme lengths, even risking severe injury, to ensure their safety.Shota is a slender and tall, pale-skinned man with messy, shoulder-length black hair that partially hangs in front of his face and half-opened black eyes. He is usually recognized for his worn-out appearance,[4][5] often looking fatigued. His facial hair is almost always in a stubbly, unkempt state (shaved for the press), and his eyes tired, bloodshot, and flat unless he's in combat.

Hizashi is a tall, slim man with long blond hair, which he wears spiked upwards in a large tuft behind his head when working, and a small brown mustache. He has rectangular eyes with concentric pupils and greenish-yellow irises (red in the manga), he is almost always seen with a large smile on his face, and is almost never drawn with nostrils.