Nothing is known about Angel or his background, besides the fact that he works for Alberto Fussar on Guarma as his lead inquisitor.
Events of Red Dead Redemption 2
After getting knocked out by a dart, Arthur wakes up tied to a chair. Angel interrogates and beats him for information about his identity and what is he doing in Guarma. After Arthur tells him that he is "Leviticus Cornwall", Angel interrogates Leon and beats him up, before doing the same to Baptiste. Meanwhile, Arthur manages to break free his chair and attacks Angel. Angel pulls out a knife but Arthur quickly disarms him and savagely beats him until he is unconscious.