Emma

 was the principal maid of Mielle Roscente whom she was always close to ever since her birth.

Appearance
Emma had brown hair that is tied in in a bun where it is covered by a cap with hair strands hanging on either side and grey eyes.

She wore a maid uniform.

Personality
Emma is fond of Mielle Roscente and she only wants her happiness, seeing Aria Roscente and her mother as a nuisance that should disappear. She didn't mind using immoral methods and influenced Mielle, in part to make her what she is. Ultimately, that was worked against her in the end, as Mielle was too egoistic to defend her. She had a manipulative mind.

History
Emma was a noble until the combined factors of both the death of her husband and her family's had a lot of debts resulted in her having to sell her title. After that, she begins to work at House Roscente, in these time she knows Mielle Roscente since her mother's death and she committed to taking care of her. She was the master mind after the control of the Aria's social life, sending maids to influence her. At finally, she achieves his goal and Aria dies decapitated.

Alternative line
In this timeline, Aria Roscente knows her plan and wins the loyalty of the first servant sent to control her, Annie. The second servant was Berry and she hadn't good luck. After Aria begins to win money and improves her reputation in society, Emma decides to order Berry to poison the tea of Aria. She avoided that by using the hourglass. Berry runs away, but she later gets caught and accuses Emma of organizing the plan.

Mielle Roscente doesn't defend Emma and she dies.

Etymology

 * The name Emma means "whole, universal" in German, Latin.