Raiden shogun

The Raiden Shogun exists in two forms — Ei, her true identity, and the Shogun, a puppet created by Ei to oversee Inazuma in her stead while she meditates in the Plane of Euthymia. This puppet follows a set of directives programmed into her, which are extremely difficult to modify. The Shogun is cold and stern in personality, even callous at times; she is limited in emotional expression, has no likes and dislikes, and has no need for recreation.[2] The Shogun thinks of herself as Ei's assistant[3] and carries out her creator's exact will, unable to act on her own volition. Due to having lost many of her loved ones over the centuries, Ei is driven by a fear of further loss, wanting to preserve Inazuma. To this end, she previously sealed herself in the Plane of Euthymia to keep herself from the effects of erosion. She created the puppet Shogun to ensure immunity from the decay of her physical body.