It’s time for Princess Syalis to start acting like a proper hostage, so the demon king issues a decree to help change that.
Hm? Indeed, assigned by the demon king himself.
.أجل، كلّفك به ملك الشياطين نفسه
¿Um? Claro. Asignado
por el propio Rey Demoníaco.
Hm? Esattamente, 
è un ordine diretto del Re Demone.