Gyro is a cocky and flamboyant executioner marked by the harshness of life, who participates in the Steel Ball Run for the sake of a young boy. Gyro nonetheless possesses an altruistic side, and likes to help anyone who needs his assistance. Out of combat, Gyro also possesses an eccentric personality and is particularly flamboyant. Gyro has a penchant for gags involving puns or an inexplicable brand of humor from bad puns. He is usually cold with strangers.