Sly is a student at Duel Academy. He is around 12 years old and sometimes hangs around Luna, Leo, Dexter, Patty and Bob, but he prefers to be on his own. He doesn’t trust many people, and people don’t trust him. As his name suggests, he’s sneaky and has ulterior motives – one of them being to steal Yusei’s Stardust Dragon card and keep it for himself. He’s cocky, conceited and street smart.