Tamaki Amajiki has a tall, lean build with a slightly hunched posture. His hair is short and messy, dark blue in color, and often appears unkempt. He has dark, sharp eyes and a pale complexion. His costume consists of a simple, dark-colored outfit with a high collar, and he is often seen wearing gloves. Notably, his Quirk causes parts of his body to take on animal traits, such as crab claws or wings, depending on what he eats. His overall demeanor is shy and withdrawn.