Bellonia

Bellonia is the homeland of Prince Tatyus and they are ones responsible for the death of Beligrad's mother. They have committed genocide against an unnamed people who Beligrad's mother and, by extension, Beligrad are a part of.

They are a fascist state whose ruling family uses propaganda to brainwash, indoctrinate, and control their citizens. Their use of propaganda is so effective that their Prince, Tatyus, wholeheartedly believes everything he has been taught since birth before he learns the truth and defects. It is unclear whether the ruling family themselves believe the false information they've spread or if they are simply trying to stay in power.

It is possible that Bellonia is The First Empire from Era 1.