Kingdom of Liones

Britannia is a kingdom that was formerly ruled by the family of Lyonesse before a coup d'etat at the hands of the Holy Knights, which made it a puppet state. The kingdom had an alliance with the fairies before the burning of the Fairy King's Forest.

Background
Britannia was a great and powerful kingdom for generations and the Holy Knights had served the Leoneth family loyally. The Seven Deadly Sins were also part of the knights that served the kingdom but was later framed as being traitors for assassinating the Great Holy Knight Zaratras. The kingdom holds Sacred Treasures which the King Leoneth had given to the Deadly Sins for an unknown reason.