Gunther Thurl is a human mercenary and veteran member of Tagon's Toughs. Thurl is a very capable officer and soldier with seniority over almost every other member of the Toughs, but has only remained with the company due to the understanding that he will immediately resign should he ever be promoted above the rank of Chief Warrant Officer.

When Thurl first signed on with the Toughs, he suffered from chronic obesity - although he often defended his condition by claiming that he was "just big boned". Following his decapitation during the retaking of Princess Tyola, he was genetically altered to make his body leaner and more muscular. Although he initially complained about the change, he has retained his new body ever since.