Leo regulus, also known as reo no regurusu in japanese, is a young gold saint from lost canvas who is renowned for his exceptional skill and keen perception on the battlefield. he first appears prominently in jamir where he releases the ship of hope ice to travel to the lost canvas. during this time, he faces off against behemoth violate before engaging in a bloody fight with wyvern rhadamanthys who wields part of hades' divine power. regulus avenges ilias' death by battling rhadamanthys. he is widely regarded as a genius and capable of firing up to 100 million hits per second. as a training partner of unicorn yato, he is almost the same age as his master sagittarius sisyphus. regulus is considered one of the greatest riders of all time, able to run athena's powerful exclamation alone and providing easy techniques from other riders. in the current era, aioria wears the armor of the gold lion, making him the strongest of the season alongside shaka and the protagonist of the episode g.
He dies in the battle against Radamanthys