The British Royal Family (イギリス王室 Igirisu Ōshitsu) or the Royal Family Faction (王室派 Ōshitsu-ha) is one of the many Magic Side factions of the Toaru Majutsu no Index series. It's the Royal Family of that is comprised of all the relatives of the current acting monarch and are the leaders and rulers of the United Kingdom. They appear as the titular protagonist faction of the the British Royal Family Arc where they manage to prevent Carissa from seizing power.