Daisy is a dog that joined Nikki's family in Tales From a Not-So-Perfect Pet-Sitter.

After smuggling the dogs into school, a Girl Scout leader offers to take them and attempts to find them the perfect home. One day, Nikki's father comes home with one of the puppies.

His fish, CD, had died so he wanted to replace him. They name her Daisy and is briefly mentioned in book 11 and was one of the main topics in book 12.