Mama Louise is a voodoo practitioner and a close friend of Detective Carolyn Barek, who consulted her when studying various religions.
Mama Louise was crucial in the case of Lydia Wyatt, who conned people using herbal solutions into paying her for remedies and mildly poisoning them when they refused. She provided a remedy for Logan's poison ivy Wyatt tricked Logan into touching on one of her candles. (CI: "The Healer")