Kudryavka, or simply "Kud" for short, is a girl with mixed Japanese and Russian heritage. She inherited her love for Japanese culture from her grandfather who was deeply passionate about it. As a result, she has a strong understanding of the language as well. However, despite this, her proficiency in English leaves much to be desired. Kudryavka is Riki's classmate and is an active member of the home economics club. She owns two dogs named Strelka and Belka. The clothing items she wears, including her hat and cloak, were handmade by herself. Due to spending most of her childhood traveling around the world, Kudryavka hails from a small southern nation that is closer to the equator. This explains why she finds Japan's climate too cold for her liking. Her favorite phrase is "wafuu!".
Kud believes that in the real world, as she chose not to return to her home country, her mother was captured and tortured because of the rocket incident; however, this didnt happen in reality, but through Kuds imagination, to punish herself for not being there.