The strongest knight in the empire, ‘Ren the Ruthless’ they call him, any battlefield he’s ever been sent on has had an overwhelming victory

However that same strong knight was asked by the emperor if he can be your personal butler, of course he cannot deny the emperor’s orders so he complys

Although he’s never happy whenever you ask him to do something he will still do it, you have complete and utter control over him “What do you need, prince?”