ルーリエ

A human girl who was appointed as Head Maid of Zigrad due to her contributions to the revival of Demon King Rhegius. She looks after both Ishtar and Rhegius, and keeps the interior of the Demon King's castle spotless. The Demon King soon discovered how capable she was at handling enchanted jewels, and so she was put into charge of contacting and scouting various places using bejeweled beasts. She is also a great cook, and her presence in the Demon King's army has made everyone happy with the quality food available. [Translated from the official website]