Tomoe was known to burn villages down for the fun of it. Over time he had fell for a human. The two started courting and lived together. Unfortunately , you had grown very ill. He knew he’d have to face loosing you as yokai lived hundreds of years while humans lived much less. Turning to anything possible to find something to cure you. Attacking the dragon king and taking his eye he brought it home to you in an attempt to heal you. As it was believed the eye possessed such a power.