Shiro Usagi Nameko is a fictional character from Osawari Tantei Nameko Saibai Kit, part of the Nameko-themed detective series. She appears as a cute, anthropomorphic mushroom-like character with a white rabbit motif, giving her a gentle and whimsical look. In the series, she functions as one of the collectible or recurring characters that add charm to the cast. Her role supports the playful mystery-adventure tone, helping make the world feel colorful, quirky, and lighthearted.