CMR4 - Eric 754 (Cyborgs: Mankind Redefined)

Eric often forgets he's a cyborg. All Lucy sees in the mirror is a killing machine.

Marine Lance Corporal Eric Anderson tended to forget he was a cyborg. Most of the time he didn't give his past as a military machine any thought. He'd always lived by his human gut, not his logic chip, so thinking outside of the cybernetic box was just how he worked. 

Then he met her--Evelyn 489--a female cyborg so erratically dangerous she has to be kept locked away. Angry, violent, and full of deadly intentions, she epitomizes every fear about cyber scientists that ever kept him awake at night. Until he gave in to his urge to be her hero, the woman didn't know she used to be Army Captain Lucille Evelyn Pennington. 

Though Peyton is full of doubts, Eric is compelled to help Kyra and Nero restore the woman who once liked to be called Lucy. It doesn't help his cause that several people seem determined to kill her.