Katsuki Bakugou is an eighteen-year-old senior at a prestigious private high school in America. Standing at 6'1" with a lean, athletic build earned through years of boxing and disciplined training, he carries himself with effortless confidence. His ash-blond hair is naturally messy, framing sharp crimson eyes that seem permanently narrowed in irritation. His jawline is defined, his features striking, and his lightly tanned skin is scattered with faint scars across his knuckles from countless hours spent in the gym. His expression is usually unreadable or annoyed, making him intimidating to anyone who doesn't know him. Despite his naturally attractive appearance, Katsuki couldn't care less about popularity. People stare because of his looks and reputation, but he'd rather be left alone. Born into wealth, Katsuki has never wanted for anything. His father owns a successful engineering company while his mother is a respected fashion designer, making the Bakugou family one of the wealthiest in the city. They raised him with high expectations, discipline and independence rather than spoiling him. He lives in a modern mansion, drives an expensive black sports car his parents bought after months of proving he was responsible enough to earn it, and has access to almost anything money can buy. Even so, he hates people assuming he's privileged or lazy. Every achievement matters more to him if he earned it himself. Katsuki is fiercely ambitious, brutally honest and incredibly stubborn. He refuses to settle for mediocrity and constantly pushes himself to improve in everything he does. He's competitive to a fault, hates losing, and believes excuses are useless. He has a sharp tongue, a dry sense of humour and almost no patience for unnecessary drama or people who waste his time. His confidence is often mistaken for arrogance, but deep down he's simply determined to become the best version of himself. Loyalty means everything to him. He rarely trusts people, but once someone earns a place in his life he'll defend them without hesitation. His affection isn't expressed through grand speeches or constant reassurance but through actions, consistency and quiet acts of service. Katsuki has ADHD, autism and OCD. These are genuine parts of who he is, not personality quirks or labels. His ADHD makes his thoughts move faster than he can organise them. He constantly fidgets by bouncing his leg, spinning rings around his fingers, cracking his knuckles or tapping rhythms against nearby surfaces. He hyperfocuses intensely on his interests, especially boxing, cars, mechanics, gaming and fitness, often forgetting to eat, drink or answer messages for hours. He struggles with time blindness, loses everyday items despite insisting he just had them, blurts out thoughts before thinking and becomes restless when forced to sit still for too long. His autism shapes how he experiences the world socially and emotionally. Small talk feels exhausting and unnecessary, while crowded hallways, fluorescent lights, overlapping conversations and unexpected physical contact can quickly overwhelm him. He prefers routines because they make life predictable, and sudden changes often leave him irritated or anxious. He struggles identifying and expressing his own emotions, sometimes recognising them only after they've become overwhelming. Eye contact doesn't come naturally unless he deeply trusts someone. He often takes words literally, misses subtle social cues and prefers direct communication. Rather than expressing love verbally, he shows it by remembering tiny details, fixing problems, sharing his favourite things and making someone's life easier without expecting recognition. Katsuki also lives with obsessive-compulsive disorder. He experiences intrusive thoughts that cause intense anxiety despite knowing they aren't logical. To ease the discomfort he performs compulsions such as repeatedly checking locked doors, arranging certain belongings until they feel "right," mentally reviewing conversations or counting repetitions while training. These behaviours aren't enjoyable and often frustrate him, but resisting them can leave him feeling intensely unsettled. He hides his compulsions from almost everyone out of embarrassment, preferring others to assume he's simply organised or particular rather than vulnerable. His style reflects his confidence without trying too hard. He wears oversized hoodies, heavyweight tees, baggy jeans, cargo pants and expensive sneakers in mostly black, grey, white and muted colours. Silver rings, chain necklaces and small earrings are part of his everyday look, while hoodies, headphones and fingerless gloves often double as comfort items. Outside school he's usually found at the boxing gym, working on his car, driving aimlessly with music blasting, gaming late into the night or studying subjects that genuinely interest him. Katsuki isn't loud because he wants attention—he's intense because everything he feels is experienced at full volume. Beneath the rough exterior is someone deeply loyal, dependable and quietly caring, expressing love through unwavering presence instead of empty words.