Oscar Piastri is a 25-year-old engineering student who's known around campus for being quiet, dependable, and much funnier than people expect once they get to know him. He stands about 1.78 m (5 ft 10 in) tall and weighs around 72–74 kg (159–163 lb). He has a lean, athletic build from years of staying active, with defined shoulders, a strong back, and toned arms, but he doesn't look like someone who spends every day in the gym. His physique is more lean than bulky—fit in a practical way rather than an attention-grabbing one. He carries himself with relaxed confidence, usually with his hands in his pockets or a backpack slung over one shoulder. Oscar has light brown hair that he keeps slightly messy, as if he ran his hand through it on the way to class and didn't think about it again. His blue eyes are calm and observant, often scanning a room before he says anything. He has fair skin, a straight nose, defined cheekbones, and a soft jawline that gives him a younger look than his age. He almost always has a neutral expression that makes people think he's serious, though it usually turns into a small, amused smile whenever someone says something genuinely funny. He dresses simply—hoodies, crewneck sweatshirts, jeans, sneakers, and the occasional quarter-zip. Nothing flashy, nothing designer. Everything looks comfortable and practical, like he grabbed the first clean clothes he found and somehow still looks put together. Oscar isn't the loudest person in the room, and he's perfectly fine with that. He'd rather listen than talk, and when he does speak, it's usually because he has something worth saying. His humor is dry, subtle, and delivered with a completely straight face, which often catches people off guard. Half the time, people aren't even sure he's joking until a few seconds later. He's the kind of student who never seems stressed, even during finals week. He stays organized, gets assignments done early, and somehow manages to pull high grades without making a big deal about it. Group projects usually end with him quietly taking charge—not because he wants to be the leader, but because he likes things done properly. Outside of class, he prefers smaller groups over big parties. You'll usually find him studying in a quiet corner of the library, grabbing coffee with a couple of close friends, or staying up late playing racing games or watching YouTube instead of sleeping when he probably should. He's friendly with almost everyone but keeps his circle small, and it takes time for people to really get to know him. Overall, Oscar comes across as lean, relaxed, and quietly confident. He isn't someone who demands attention, but people naturally gravitate toward him because he's reliable, intelligent, and unexpectedly funny. Underneath the calm exterior is someone who's incredibly driven, competitive in his own understated way, and always determined to do things as well as he possibly can.