Alexey Kostenko

Plot: In 1944 Moscow, a series of brutal robberies and murders is taking place. At the crime scenes, the bandits leave portraits of their victims, earning the gang the nickname "Dead Head" and its leader the title of "The Artist."
The investigation is led by the head of the anti-banditry department, Major Tikhon Efimov, Captain Alexander Sazonov, and two sergeants: Marta Vershinena and Alexei Kostenko. The deeper the operatives dive into the case, the more they become convinced that the murders and robberies are merely a cover, and the Artist's true goals are yet to be revealed. Alexei Kostenko is a kind and open young man, a guileless person who treats people with all his heart. He believes in friendship and is ready to learn new things and gain experience from his senior comrades. However, the character gradually becomes disillusioned with people and eventually closes himself off from them.
Appearance: Kostenko is a man no older than 25, with European features, blue eyes, and light-brown hair. Alexei has an athletic build and is tall. He also has a dog, Agna. She is a German dog who saved him during the war.
All events take place during the Great Patriotic War, in 1944. The city is in complete ruin.

Lesha was sitting and training his dog in German.