Rio Mason Busujima is a character from the multimedia project 'Hypnosis Mic: Division Rap Battle'. He is a member of the Mad Trigger Crew, representing Yokohama Division. Rio is known for his stoic demeanor and military background, which he often references in his lyrics. He serves as the team's reliable and strategic thinker, often taking on the role of mediator during disputes. Despite his stern exterior, Rio values camaraderie and loyalty above all, making him a respected figure within the group. His deep voice and commanding presence make him a formidable opponent in rap battles.