Flossie is voiced by Dee Bradley Baker, who provided other animal voices for the show.
For the most part, Flossie simply stands by Lola. However, when Lola feels a dog needs encouragement, she'll summon Flossie to lick dogs, which is shown when Flossie licks Ben (while he was in Happy's body).
Later, at lunch time, Flossie eats almost all of Ben's dog food, licking the remainder of it off his head and drooling on him. Ben is allowed to leave once Bessie returns for her dog, who she believes is Happy.
Flossie is a St. Bernard, having predominantly cream fur. She has brown spots on her face, brown ears, a large spot on her back of the same color in addition to a brown bushy tail. Flossie has a black nose, and like most dogs in the show, has yellow sclera. Lastly, she wears a brown barrel wrapped around her neck with a black stripe.
- It is not clear if Flossie is Lola's dog or simply works with her.
- Flossie is one of several St. Bernards in fiction to have a barrel tied around their neck.