After listening to Vibrant Eyes by CG5, I couldn’t help but to connect a few of the lyrics to the backstory of Azazel. Though, it was only when I heard the following lines did I really decide to actually draw in relations to the song:

“Little voice ruining my sanity
Evil dreams haunting me
Don't you ever look my way
Little voice ruining my consciousness
Nothing left to reminisce
I would rather run away”

It was the voice/vocal switches that really did it for me. The first half being deeper and almost robotic, then going to a more normal, younger sounding voice. For the first bit, it made me think of how Phantom retains confusing, negative feelings towards dreams he can’t understand, aka his past life as an angel. The second portion reminding me of how Azazel had no good or positive memories of his home, prompting him to leave.