What is one good characteristic of Lieutenant Kotler from the novel The Boy in the Striped Pajamas?

Lieutenant Kotler is an antagonist throughout the novel The Boy in the Striped Pajamas. Kotler is an overconfident, shallow nineteen-year-old Lieutenant in the Third Reich. Bruno absolutely despises Kotler throughout the novel and watches with indignance as Gretel flirts with him. Kotler is known for his violent temper, and there are several scenes which portray Kotler's rage. Kotler lacks sympathy and ruthlessly beats weak prisoners, such as Pavel and Shmuel. Despite Kotler's numerous negative character traits, he is a very ambitious individual who is rather charming. Bruno mentions that Kotler is continually at his home, trying to impress his father. Kotler hopes to become close with the Commandant in order to climb the ranks in the Nazi Regime. The Commandant initially likes Lieutenant Kotler because of his willingness to follow through with directives and his desire to participate in Germany's war effort. Bruno's mother is attracted to Kotler's charm and begins to have an affair with him, while Gretel also shares an affinity for the young Lieutenant. Despite Kotler's charm and desire to impress the Commandant, his ambitious attitude and disregard for authority result in his dismissal from Auschwitz.