The Royal Knights

Demon royal order

The Royal Knights are the elite order sworn directly to the Demon King. Shun is addressed as a former Royal Knight and Hero of the Demon War; Akiyama is a commander and active member who escorts him to judgement.

The oath

The Unbreakable Oath states that the Lord of the Tower’s first biological son must assume the same post at maturity unless he defeats the strongest current knight. It turns Shun’s private punishment into a future obligation for Ryuji and makes the order central to the Tower household’s fate.

Service and rank

The order provides the Demon King with disciplined elite force. Shun’s former membership and Akiyama’s active command establish that the Tower guardian was once integrated into demon military power before his isolation in Eterna. Akiyama’s public insistence that guards respect Shun’s former status shows that the title remains meaningful even while Shun is arrested.

Inherited punishment

The Unbreakable Oath changes the order from a matter of history into Ryuji’s possible destiny. It does not merely threaten a future appointment: it binds a father’s political disobedience to a son who did not choose it. The escape clause—defeating the strongest current knight—makes strength, inheritance, and freedom inseparable.