Mirio is a tall young man with a very muscular build and several noticeable scars around his lower arms. His design is unique due to his beady blue eyes, drawn in a simplistic style with no visible sclera, and nose prominently rounder than most others. He has blond hair, the top part of which is arranged in a quiff hairstyle, while the bottom section is worn swept backward.In his hero costume, Mirio wears a white skin-tight top with the number "1000000" (one million) stamped across his chest in a bold, yellow font. The trimming on the top and shoulder pads are made in a matching fashion. On his waist, two green lines act as a belt, along with some lines of similar appearance on his shoulders, which dip in places to form two V's. Mirio also wears baggy dark blue pants, with the back being white, divided in the middle by the blue, and white knee-high boots with yellow soles. He wears a red cape as well as thick short gloves of matching color. Mirio's costume is then topped off with a white visor with yellow lenses, although he doesn't wear it often as it falls off when he activates his Quirk.Mirio usually comes across as a highly goofy and energetic individual with peculiar habits. Based solely on his personality, many question how Mirio is one of U.A.'s top students. Mirio has a very optimistic attitude and can almost always be found smiling. Mirio is known for his odd sense of humor. His jokes range from corny to puerile, occasionally making a fool of himself for others' enjoymenMirio does not allow his laid-back nature to cloud his judgment or impede his dreams of becoming a hero. He has proven an extremely hard worker, turning a near-unmasterable ability into one of the world's most powerful Quirks. Mirio is constantly looking for ways to improve his skills and tries to work toward his goals by accumulating different experiences to learn from them.[8]Mirio is considered U.A. High School's most powerful student. Because of this, he is the leader of the Big Three U.A.'s best students, along with Tamaki Amajiki and Nejire Hado. Mirio, in particular, has earned enormous acclaim due to a combination of extraordinary technique, excellent fighting ability, and a charismatic personality, to the point of being considered a contender for the No. 1 spot among Pro Heroes Mirio's greatest strength is incredible mastery over his near-uncontrollable Quirk, to which he is often considered invincible. Mirios quirk permeation allowed him to phase through anything