Sensu

The soul of a fan particularly valued by its owner, the mythical court dancer known as Lady Shizuka. She was sealed away by Yoshitsune’s elder brother, Yoritomo.

How to acquire?
It is by completing all six sealstones to unseal Sensu. Sealstones are acquired from the stories of Chapter 5 or stealing from other ghost agents by battling them. Completing again the sealstones will acquire Sensu Magatama.