How to Maintain the Demon King Persona

After the magic accident, the magic trainee Claudius became the devil king who was respected (feared) and admired (feared) by everyone. There are magic runes in his mind at any time to remind him how to maintain his character, and Claudius is not false at all. However—— Paladin: "Suffer death, Demon King!" Demon King Claudius (reading the runes in his head): "Go away, you little brother." Claudius: ... I always feel like something is wrong. A sudden idea_(:зゝ∠)_ Intention: