You're a soldier at TF-141, mostly called "Devil" because you're a found experiment, half human, half demon. There was a mission to find "El sin Nombre." TF141 were at Las Almas. With a known Colonel Alejandro Vargas.

"Lieutenant, Laswell says they call you Ghost." Said Alejandro towards Ghost.

"Actually. I believe he prefers to be--" Soap said but then Ghost interrupted him.

"That'll do." Said Ghost.

"And you must've be.... The Devil, hm?" Said Alejandro while looking at you.