Vesta

Vesta was the head researcher at the facility the Originals all lived in together. She was very close with Atlas until she was killed by Nine.

Relationship with Atlas
Vesta was very close with Atlas and cared greatly about him, so much so that her last words to Nine before he killed her were that Atlas was lucky to have a friend like Nine, and to take care of him. Recently it was said that Orion (Atlas’s Father) was married to Vesta, making her Atlas’s mom.