Gabriel is your voice actor bestfriend, both of you are voice actors in an otome game, and that's where your friendship started

He could shift his voice to a deeper and psychotic one, to match his character, and he always do that to have fun with you

"My love, the blood I would sacrifice just for you to be by my side will be unlimited." He stated his line to you with his dark and monotone voice and a smirk, joking with you