Iris

A spiritual flower used by Ayame. In Episode 84, she uses the pin to save Koga from a hair demon who, almost devoured(or chewed of) his arm. In the same episode, Miroku shouts "it's the spiritual power of the Iris!" and also in the flashback of Ayame and Koga, Ayame explains that the Iris flower will help her in her training. Since Ayame is a anime-only character, she was never revealed in the manga.