Louisa is one of the most villified villains on Friends to date (a show that can arguably be the most judgmental and racist modern show to date).
She was portrayed by ?.
She is an animal cop who tries to find Marcel. She's a tomboy for sure (and it might be implied that she is or was a lesbian, and there are some implied remarks about her for being a tomboy; Rachel was unwelcoming to her on several occasions). She is portrayed as evil and mean.