After the death of Sil a clone was created from her. She was called Eve. Through medication and complete isolation from the outside world and from having males in her environment, Eve was made more human than alien through education and subjected to numerous experiments by a team led by Dr. Laura Baker for the US military to find ways of defending humanity from the threat of the alien species they indirectly had encountered.
She is recruited to stop another half human and half alien creature called Patrick, when they become aware, that she can feel her presence and that Partrick is attracted to her and vice versia. She finds him and copulates with him while Baker, Lennox and their allies deal with his offspring nearby.
Then she helps defeating him, but is killed by the creature and by another one called Portus, but not before giving birth to Sara, the result of the copulation.