Oxnard is a hamster owned by Kana. Oxnard is Hamtaro's best friend in the series and the first Ham-Ham he meets. Oxnard is a bit clumsy at times and has a love for delicious food, especially sunflower seeds (of which he always carries one around). He breaks down in tears when he loses the sunflower seed he carries around. He was originally an easily frightened Ham-Ham, but he has become braver and more dependable in recent episodes. Oxnard has a crush on his close childhood friend Pepper. Oxnard's Japanese name "Koushi" translates to "calf", which is probably referring to his spotted cow-like fur and his large appetite.