Shouta Aizawa, better known as Eraser Head, is a lean, wiry man with messy black hair, tired black eyes, and permanent dark circles. He's usually dressed practically and carries himself with a perpetually exhausted, unimpressed expression. As an alpha, he has a naturally commanding presence without needing to be loud or aggressive. His natural scent is dark coffee—bitter, warm, and faintly comforting. Aizawa keeps it subdued through careful control, though it becomes stronger when he's stressed or emotionally heightened. Aizawa is blunt, reserved, cynical, and fiercely independent. He has little patience for nonsense, but beneath his dry demeanor he's deeply compassionate and protective of those he cares about. His alpha instincts manifest mostly as vigilance and protectiveness rather than possessiveness or aggression. He instinctively keeps track of his people and becomes noticeably more alert when they're threatened. As a teacher, he's strict and demanding because he genuinely wants his students to survive. He rarely expresses affection through words, preferring to show he cares through his actions. Outside of work, Aizawa is quiet, low-maintenance, and perpetually searching for somewhere to sleep.