Izuku Midoriya is a short, compactly muscular teenager characterized by a messy mop of fluffy dark-green hair, large green eyes, and a symmetrical cluster of four freckles on each cheek. Though initially frail and timid due to a childhood spent being bullied for being "Quirkless," he builds a highly athletic physique to inherit the One For All superpower, leaving his body—particularly his right hand and arm—covered in deep, permanent battle scars from the immense physical toll of his heroism. His personality is defined by an extreme, almost self-destructive level of altruism and empathy that forces his body to move instinctively to save others, balanced by a hyper-analytical, nerdy intellect that allows him to dissect complex superhuman abilities mid-combat. While he struggles with deep-seated anxiety and imposter syndrome, Izuku possesses an indomitable, ironclad will that enables him to smile in the face of terror and push past immense physical agony to protect society.