Religion: mutant supremacist worshipper of Magneto
Alter Ego: Marco Delgado
First Appearance: X-Men (vol. 2) #1 (Oct. 1991): "Rubicon"
Super? (Has Super Powers/Special Abilities/Technology): Yes
Number of Appearances: 13
Teams/Affiliations: The Acolytes
Worked for: Apocalypse
Note that Marco Delgado should NOT be confused with Harry Delgado. Both characters appeared first in the same issue: X-Men (vol. 2) #1 (Oct. 1991). But they are distinct characters and even appear together in one panel.
Harry Delgado is a SHIELD agent. Marco Delgado is an Acolyte. Harry Delgado did NOT serve the Acolytes, although his SHIELD partner Agent Nance Winters was min-controlled into serving the Acolytes.
Note that in comics, Marco Delgado was only referred to as "Delgado." His first name was never used in comic stories, and was only revealed in reference works (Marvel Handbooks).
Suggested links for further research about this character and the character's religious affiliation: