Susanoo is the Japanese God of the Summer Storms, and has one hell of a temper. That temper led to his banishment after he was defeated by Amaterasu in a making game. While Susanoo was traveling, he saw a grieving couple and their last daughter. a serpent known as Yamata-no-Orochi ate seven of their daughters, making her the last one. Susanoo said that he'll slay the serpent in return for their daughters marriage. There were no arguments. Susanoo slew the serpent and inside the tail was Kusanagi-no-Tsurugi. He gave that sword to his older sister and was back into the heavens once more. Years later, he would become the Initial Persona of Randi Makita and a Primary Unit for Victoria Mars, a Gatekeeper.
Persona-user: Randi Makita
Gatekeeper: Victoria Mars