Cecil

There is a cheerful, brown-haired maid sent from the Maid Guild at the Mochizuki household. She is voluptuous, and although her name has not yet been revealed, she is actually a member of "Espion," the intelligence unit of the Kingdom of Belfast.

Her mission is to secretly protect Yumina, and for that reason, she works as a maid in the Mochizuki household. Her special skill is throwing knives, but Touya Mochizuki was initially unaware of this, and there was a time when, together with Rapis, he mistook her for someone suspicious and apprehended her.

Eventually, after the founding of the Brunhild Dukedom, she quits "Espion" and becomes a member of the new Brunhild Dukedom.