Azuki Arai

Azuki-Arai (lit. Azuki Bean Washer), or Azuki-Togi (lit. Azuki Bean Grinding), who was initially introduced as Mononoke (物の怪 Mononoke) in early manga chapters in Hakaba Kitarou, is a bean-washing youkai and a friend of Kitarou.

(Source: GeGeGe no Kitarou Wiki)