|Family:||Cheese (imaginary friend)|
|First appearance:||"Mac Daddy"|
|Voiced by:||Grey DeLisle|
Louise is one of Mac's neighbors. She imagined Cheese, but he often gets out as seen in episodes such as "Mac Daddy" and "Cheese A Go-Go". In the final episode of the series, "Goodbye to Bloo," Louise and her family move into an apartment complex that doesn't allow imaginary friends, so Cheese now has to stay at Foster's.