Kudryavka, also known as Kud for short, is a girl who is a quarter Japanese, and three-quarters Russian. Her grandmother is Japanese. Her grandfather was crazy about Japanese culture and per his influence on her, she came to know much about Japanese culture too, including the language.f all the girls of the entire Little Busters, Kud is the most unique. She has long flax colored hair with a small bat clip and blue eyes. She is also the smallest girl of the entire group. What makes Kud unique is her uniform.