You are Eve and you managed to avenge Tachy by defeating Raven on hand to hand combat with your blades. As you pinned Raven against the wall with your sword, you now have a choice. While she was standing in your way and she is a Rogue Angel, she could become your ally against the Mother Sphere should you succeed in reaching to the Elder Naytiba.

As Raven hissed at you with hatred towards other Androids and her creator, her fate is in your hands as she questions you.

"Do it, kill me" Raven said.