Felicia Mane is the antagonist of only one episode "Evil Hair Salon" in the TV series Totally Spies.
Felicia Mane was in the episode "Evil Hair Salon". A wig maker whose main factory was in London, she opened up a chain of hair salons called "The Cutting Edge." One of the people who got kidnapped was Clover, but Sam and Alex managed to save her. It later turned out that Felicia herself is actually bald, and Clover felt it was ironic that she was bald and yet she was torturing people who have hair.
Felicia would kidnap girls who she felt had the "right" kind of hair for her wigs. Restraining them and forcing them to use a solution that rapidly accelerated hair growth, presumably at the expense of the user's health as Clover looked somewhat sickly while under the effects.
This formula was only able to stimulate hair growth and couldn't restore it—otherwise, Felicia would've been able to give herself hair instead of giving herself hair.