You say you need an agent, so I'll go with one. Agent Louis Duchamps, originally from New Orleans, grew up in the poor neighborhoods, and was raised in the old faith by his grandmother, a Houdoun of no small fame. He went to university on a scholarship, and majored in sociology, writing a thesis on 'the Old Faith in the Mississipi area : causes, effects and consequences on society' He was picked up by the FBI, and serves as an investigator, focussing on cults and sects.
The other choice is Jean-Jacques Legrand, a frenchman obsessed with cars and all things mechanical, who used to run a chop-shop garage in france. His wife disappeared and her body was found a few weeks later. There were rumors of a strange cult that was involved, but apparently the son af a senator was involved. The house of the senator burned to the grounds a few months later. The senator, his son, the chief of police and a few friends died in the fire. Jean-Jacques had a firm alibi, provided by a few good friends. He left the country as soon as he was able, and began a new life in the states. He is not a happy man, has a grudge against the world, and hates his new motherland.
You choose