Kurz is a member of Mithril. Part of the SRT (Special Response Team) of the Tuatha de Danaan's (TDD-1) Pacific Battle Group. His call sign is Urzu-6. He is an SRT AS (Arm Slave) pilot and designated marksman, equally proficient with sniper rifles and AS long range precision cannons. It is said that he can visualize the exact trajectory of a bullet, resulting in an almost inhuman accuracy. He most often forms a three-man cell with squadmate Sousuke Sagara and squad leader Melissa Mao. He is regarded as a finicky genius, burdening the Mithril mechanics with extremely difficult to understand complaints and requests.
Kurz is a Caucasian male, roughly six feet tall. He is of German descent, and sports a blond mullet and has blue eyes. He is very good looking, and combined with his outgoing personality easily befriends most people. His reputation with women in romantic terms is largely spoiled by his unflinching and overdone pursuit of "the fairer sex". Kurz can speak Japanese, English and German fluently. He had aspirations of becoming a professional blues singer before he was a soldier. From this, Kurz can sing and play the guitar quite well, entertaining the ersatz hostage Jindai High students with his rendition of "Take me out Mariana Trench" in the sixth novel, Dancing Very Merry Christmas.
In the scope of the main anime and novel series, Kurz is shown being deployed in Tokyo with Melissa and Sousuke in protecting Kaname Chidori. He is known to be a hard hitter on women and speaks in vulgar and flippant language. Despite the negative attitude he has received from women, he is still Sousuke's best friend from Mithril. Kurz annoys Melissa Mao greatly due to the open nature of his sexual feelings for her. In essence, he is Sousuke's complete opposite in personality. At the time of the novel "Dancing Very Merry Christmas", 1st Lieutenant Grouseax and the newly-promoted 2nd Lieutenant Melissa Mao placed him under observation for promotion to Sergeant Major. At the time of the ninth novel and Invisible Victory, Kurz is the SRT's Sergeant Major. His alias is Kalius, a name he used during the snatch operation on Vincent Bruno during the events of The Second Raid.
