Izuku Midoriya (緑みどり谷や出いず久く, Midoriya Izuku?), also known as Deku (デク, Deku?), is the main protagonist of the My Hero Academia manga and anime series.

Even though Izuku was born Quirkless, he manages to catch the attention of the legendary Hero All Might, due to his innate heroism and a strong sense of justice, and has since become his close pupil, as well as a student in Class 1-A at U.A. High School. All Might passed on his transferable Quirk to Izuku, making him the ninth and final wielder of One For All.

Following the Paranormal Liberation War, with Tomura Shigaraki and All For One actively targeting Izuku for his Quirk, he decided to leave U.A. before finishing his first year to keep his classmates out of harm's way.[4] After encouragement and support from his friends, he later returns to the school and leads the heroes against the villains in one final battle to save the world. After the Final War, Izuku managed to defeat Tomura and All For One, but at the cost of rendering himself Quirkless once more.

After graduation, Izuku loses the embers of One For All and becomes a teacher at U.A., but after eight years, advancements in technology allows him to return to active Hero duty, alongside his fellow Class A members.[5]

Izuku is somewhat short for his age, his round face is framed by a short mop of fluffy dark-green hair which curls up at odd angles around his head, casting noticeably dark shadows onto itself. His eyes are large and somewhat circular and his irises are the same shade of green as his hair, which at times are very watery, and are usually stretched quite wide, giving him an innocent, energized appearance. He has a set of four symmetrical freckles in diamond formations, one on each cheek. Izuku has often been described as "plain-looking" or "not standing out" by others.

Being Quirkless, Izuku lacked confidence around his classmates.

Izuku is a very timid, reserved, and polite boy, frequently overreacting to abnormal situations with exaggerated expressions.