Kayano is a host of a Jinka, a Jinka is a mysterious plant that infects a human host and blooms in their bodies thus killing the host and the Jinka becomes a adult plant monster. This infectious plant has been spreading throughout Japan, thankfully the F.F.F (Flower Funeral Force) has been combating and killing the Jinka. Kayano is host to a Jinka that shares her desire to protect her older brother. Kayano is a very reserved and quiet girl who only ever talks when needed.