Doris is a newcomer to RKS making her appearance in Rosenkreuzstilette Freudenstachel. She is ninja-esque in appearance and wears pink headphones, and carries a large, over-sized shuriken, her Fesselspirale, whith ease thanks to her incredible strength despite her outer appearance. She is the leader of the RKS Special Ops Unit, one of three different portions of RKS (the others being the RKS Intelligence Unit, whom Karl Palesch works for, and the RKS Strike Force, led by Sichte Meister). She is calm in the heat of battle but can be careless and reckless most of the time. She is a hard worker and hates to lose. She's very intelligent yet knows very little about the outside world. She is also easily jealous. She also hates being called small, judging by her small size and the others being taller than her.
Her weapon, the Fesselspirale that she wields, allows her to gather wind power from the objects around her into it, which she can throw like a boomerang. Her Fesselspirale arcs in a fashion normally impossible.
Doris was designed by Hissatsukun. She is one of the winning entries of a boss design contest for Rosenkreuzstilette Freudenstachel so far, the others being Pamela Arwig, who was designed by alphes, Eifer Skute, who was designed by Aburidashi Zakuro, Schirach Fühler, who was designed by Daddy (Tatei), and Lecht and Rink Refraktia, who were both designed by REDMOON.