Who is Madame Lile Devalier from Jitterbug Perfume and what is their importance?

Madame Lily Devalier is Priscilla's stepmother, who resides in New Orleans. Lily is thr proprietor of a perfume shop called the Parfumerie Devalier, a business that belonged to her father before her. In the Latin Quarter, she is known as the Queen of the Good Smells. Lily raises Wally's daughter, Priscilla.