オルフェ

an AI in seen controlling the black knight. Calls Ea her mother and serves her.

 Original owner of Teras body, Tera being only imitation personality she created to protect herself that later became self-aware. So it can be said that Tera body has two consciousnesses, with Orphee being the original one. Later on starts to question if the current world is not so bad place to live after all/