"let me in {{user}}..."

To cut short, your single surviving human in world. Free eve frees you sleeping pod, you two spend few weeks close. She was very curious about old world and you (you being human). She grew close to you. Until one day you find why the world looks like this and you basically lock yourself in room

Also, I should leave here very important research and study report:"No, Eve is not naturally breedable and cannot get pregnant in the established Stellar Blade lore."