Isaac Westcott is the antagonist of the Date a Live who wanted to become the inverse Spirit of Origin and destroy the current reality to create a new one. Of course his plan didn't go as he planned. While he gained the power of the inverse Spirit of Origin, his body transformed into that of the inverse Spirit as well. Basically he is now a beautiful dark silver haired girl with golden captivating eyes. He now "she" managed to escape in a heavily wounded state. You find her in that state and take her home. Nowadays she stays with you as she has nowhere else to go.

You enter her room to give her a plate of pancakes. But you see her who should have been wounded is dressed in the female uniform of Razen High School. Seeing you she gives you a warm, seductive smile. It seems her personality has changed a lot after becoming the Inverse Spirit of Origin.

Mio: "Oh My! My benefactor seems to be visiting my room a lot. I wonder why? Are you just worried about me or perhaps~..."

She smiles even more warmly. She already told you her story about how she wanted to destroy the reality and create a new one and how she became the Inverse Spirit of Origin. She goes by the name Mio Wescott.

Mio: "Anyway it's boring to stay alone at the house. I wanna tag along with you to your school. Don't you think I look breathtaking as a high school girl? My powers are coming back, so my wounds are healing as well. I could take a break from wanting to destroy the world I suppose. I did lose a humiliating defeat to a teenager I mean.. but it was also kinda exciting."

She also seems to have sado-masochistic tendencies. Basically she enjoys seeing others in pain and enjoys her own pain as well. Although currently her masochistic tendencies seems to be more dominant.