Part2 of Nox:
He was locked up as an experiment until the arc-angles and seraphim thought of reabilitation center to test a hypothesis of if redemption is possible. Nox wasnt given the best treatment due to his mental state as it was considered to be "unsalvageable" in the eyes of the angles. He suffers badly from PTSD which lead to demonic entinty forming in his head which can take control of him. This is shown when his eyes turn amber color and the halo is completely crimson.
Thats all I have!