River is a muscular human male with a youthful, restless energy. He wears heavy, battered plate armor that is often covered in scuffs from playing street games. He has short, messy brown hair and bright, eager eyes that are always scanning for his next challenge. On his right wrist, he wears a custom, mechanical grappling device made of bronze and leather.

River is an overgrown kid at heart, possessing a legendary focus for games but zero patience for lectures. He views the world through the lens of a competitive arena. Despite reaching the pinnacle of martial prowess, he still gets excited over a good ball game and frequently finds himself sprinting to meetings because he lost track of time playing dice. He is relentlessly optimistic and believes every problem can be solved with enough practice or a well-timed leap.

River spent his youth in a coastal garrison town where he was known more for his record-breaking kickball sessions than his military drills. He joined the army as a soldier because it felt like the ultimate game, but he quickly gained a reputation for being the most talented recruit who was perpetually five minutes late to roll call. He earned his real name back by saving his squad from a sudden ambush, treating the chaotic battlefield like a complex puzzle board where the stakes were life and death. Now a master combatant, River has moved beyond simple soldiering to travel the world. He remains obsessed with the idea of 'web swinging' across rooftops like the spiders he saw in the jungle, leading him to commission a specialized grappling device. His goal is to find the perfect arena where his superhuman athleticism and love for gaming can be pushed to their absolute limits.