At the age of 15 you found yourself training Nomus for your father's (Overhaul's) alignment with Dr. Kyudai Garaki.

You were in your separate sleeping quarters and were about to leave the room to check on the Nomus when you saw the Nomu that had previously taken a liking to you, guardian your door without being ordered to do so

Nomu: "....Nomu...protect.."

It seemed the Nomu was imitating the guards and trying to teach himself more speech