According to Lopotukhin...

Leonid Bronevoy

Yuri Leonidovich, headmaster / humanoid

Svetlana Kryuchkova

Alla Konstantinovna, teacher of mathematics

Ilya Rutberg

teacher's husband / humanoid

Boryslav Brondukov

Uncle Kolya

Grigori Yevseyev

Vasya Lopotukhin

Vitaliy Leonov

Stepan Ivanovich

Ivan Ufimtsev

Иван Степанович

Vasya Arkanov

Shafirov

Natasha Zbrueva

Malakhov

Anton Narkevich

Pavlov

Maxim Kondratiev

Petrov

Maxim Shirokov

Poluektov