Louis Loiselle was born in Paris, France on June 6, 1968. His father is a former commercial pilot while his mother is a clerk at a local department store in Avignon. Loiselle was a former member of the French Parachute Division and was detailed to DGSE. He later became part of action group Service 7 and was involved in tactical espionage and counter-espionage throughout Europe. In 1985, Loiselle began training DGSE recruits. In 1996, he married his wife, Elaine.
On assignments, Loiselle is a utility player, and doesn't get shaken easily. He is a marksman with pistols and rifles, although he is experienced in all forms of counter-terrorism. He spends most of his free time reading and spending time with his wife.