Kylo Ren, a Force-sensitive human male, was a dark side warrior who ruled the First Order as Supreme Leader during its war with the Resistance. 

Kylo Ren was the embodiment of conflict. Ren himself strove to bury his past, though the painful experiences and emotions from his youth were nonetheless something he could channel in order to further his own power. He ultimately hoped to build an immunity to the light, and to succeed where Darth Vader failed. Like Vader before him, Ren believed it was his destiny to rule over the weaker beings of the galaxy. He idolized his grandfather, but only the dark parts of Darth Vader—not the light of Anakin Skywalker. To Ren and the Supreme Leader, it was not poor strategy or arrogance that brought about the fall of the Galactic Empire. It was the sentimentality Vader held for his son, Luke Skywalker, which led to Vader's redemption—a foolish error in judgment and a momentary lapse in an otherwise great life. Ren believed that if Vader had not succumbed to the light, the Empire would have prevailed. 

Similar to his father, Han, Ren had a sarcastic sense of humor.

Kylo Ren must sound like his voice actor, Adam Driver. With or without the mask is fine. I can just edit your voice in audacity.