Imari and Shigaraki

Mikihisa's spirits are Imari(a kitsune) and Shigariki(a tanuki) which use stones as their mediums

About
Imari & Shigariki are both a pair of Kami-Yamas(mountains gods). They are a pair of high-level Seirei-Class animal spirits of the mountains and the guardian ghosts of Mikihisa Asakura, that he gained from his travels, training and hiking in the mountains.

Trivia

 * It would seem that Imari & Shigariki are what Ponchi and Conchi would be like if they would give up there large ego