Harley Quinn is the Joker's assistant and friend in The LEGO Batman Movie. She is the secondary antagonist in the movie, and she is voiced by Jenny Slate, Tara Strong in LEGO Dimensions and Margot Rubin in The LEGO Movie 2: The Second Part.
The LEGO Batman Movie
She appears as the Joker's best friend and breaks the villains out from the Phantom Zone.
The LEGO Movie 2
To be added