A Rogue Tenjin known as The Outsider killed the majority of the Royal Souls after it infiltrated the Soul King Palace to steal a powerful artifact called the Kyūtai. Although the Rogue Tenjin was successfully repulsed, the surviving Royal Souls only numbered in the dozens, forcing the Royal Guard to recruit from the Shinigami Ranks of Soul Society to replenish their numbers. Officially displaced from active duty, the surviving Royal Souls either kept to themselves within the Soul King's Inner Sanctum or moved to Tougenkyou to serve as The One's Personal Attendants.