Ryohei Arisu is a fictional character from the Japanese manga and anime series Kakegurui. He is known for his calm demeanor and strategic thinking, often participating in high-stakes gambling games at Hyakkaou Private Academy, a school where social status is determined by gambling skills. Arisu is a member of the Student Council and possesses a unique ability to read opponents' emotions, giving him an advantage in games. His character is complex, often showcasing a blend of confidence and vulnerability, which adds depth to the storyline and engages viewers in the intense world of competitive gambling.