"It's... I might make a mess of this, I apologize, I'm using up a lot of brainpower on name-related censoring and trying to avoid saying things that might be orders, but - the word 'vassal', on this planet, refers to a cultural phenomenon with no magical enforcement whatsoever. And under that system, having a vassal comes with responsibilities. I take those responsibilities very seriously. You're obviously coming from a vastly different context, but as far as I'm concerned, for as long as you are magically required to obey my commands I have a personal duty to see to your safety and comfort."