Thanarosa

The first world that Arc encounters on his journey is that of a great forest. Upon seeing the massive, towering trees, Light realizes that this world is not his own.

What was left behind...

A Tactical Doll, also called T-Doll, is an AI-piloted android originally designed to serve as an easily replaceable fire platform for military operations.

And thus began the 7th World... Diche, the Goddess of Life, summoned all of her waning power and once again gave shape to the Guardians and the Heir of the Covenant. "My children, I entrust this world to you."