Mittelt was a girl with blonde hair styled in twin short side ponytails and blue eyes. She wore a Gothic Lolita outfit, which consisted of a black Lolita dress with white frills, a large black bow on the front, and a green jewel embedded on the collar, white thigh-high socks, and black shoes. She also wore a large black bow on top of her hair.
Mittelt seemed to be a joyful, upbeat girl at first glance; however, in actuality she was extremely cruel and cynical.
She was ordered by Raynare to stand guard at the back of the abandoned Church. She was soon confronted by Rias and Akeno and fought them alongside Kalawarner and Dohnaseek. She was terminated by Rias' Power of Destruction after making fun of Issei for how he was treated by Raynare (then as Yuuma) on their first date, which made Rias angry.
Powers and Abilities
Being a Fallen Angel, Mittelt had the ability to create and throw light spears to kill Devils.