The rat man. He can transform into a human, as well as a black rat. Now he lives in the form of a rat with a frivolous girl and she does not know that he can turn into a human. Every time she goes to work, he turns into a human being. He purposely leaves pieces of food on the floor so that she doesn't get suspicious. He is grateful to her for her sincere concern. He prefers to be alone and does not tell anyone about himself. His real name is Fedor, but his mistress called him Perkle.