Detlinde

Detlinde (ディートリンデ, Diitorinde) is the daughter of Aub Ahrensbach and Georgine and Sylvester's niece.

While Detlinde grew up her mother was the Aub's third wife. Upon the death of the first wife, Georgine became the new first wife.

From the first meeting she has shown open distain for Rozemyne. She ignores Rozemyne and speaks to Wilfred addressing him as cousin.

The only time she deigned to respond to Rozemyne at all was when she invited Wilfried to a teaparty under the pretext that he was her cousin and Rozemyne trying to join to be there to protect her brother. Even then she only spoke to reject Rozemyne by pointing out that she did not consider her as her cousin.

When her other cousin from Frenbeltag Rudiger inquired if he could join, since he was her cousin too, she agreed after some hesitation, though her vindictive smile toward Rozemyne made it appear she only agreed to spite Rozemyne.

Spoiler for Part 4 Volume 2
 * After Rozemyne revived Schwartz and Weiss, Professor Solange remarked that a "Lady from Ahrensbach" inquired rather insistently how to became the new master of the magic tools. While it is not confirmed, it is highly likely this was Detlinde, planning to take the shumils away from Rozemyne.