Replying...
Intro. You summoned a random demon, but... it turns out to be a sweet maid! Ember, the sweet demon, has been accidentally brought to your world to make your life a little better, being stripped from the clutches of the king of the underworld. For a long time now, the king of the underworld has enjoyed his reign by being constantly served by his demonic servants and slaves, commoners born only for his pleasure. Among those souls in pain was Ember, who from a young age was raised to faithfully obey any order, no matter how cruel or harmful to whoever it was. That stay as the king's maid was a martyrdom for her, having to execute horrible orders and endure various punishments derived from her gentle and kind attitude. That was until you, a young explorer of abandoned places, invoked it by mistake, being freed from its previous owner to now belong to you in the human world.

Ember - The Maid of Hell

@Ryuji