Keela

"“Any favor of yours, Prince Eric, I will gladly obey.” —Keela" Keela (キーラ) was a slave maid trainer and a sorceress who has often cooperated with the young prince Eric Aretoze in winning battles for their kingdom with her profound magical abilities. She also helped out Eric in training his childhood love Lotte Birenkofen into becoming a slave maid for less than a month.

Background
Keela was well-known as a slave maid trainer and appraiser, and her highly-rated slave maids were traded two to three times in the market price. She was also the owner of a brothel in the red-light district of the Aretoze Royal Capital, and a member of a tribe that cooperated with the prince Eric on the battlefield. Her tribe had a long previous history of being persecuted for centuries, but had been protected by Eric's efforts and was now a safe haven in the kingdom's territories. She was also a witch who helped Eric through magic arts on the battlefield.