|Monster High Student|
|Monster Parent||The Joker and Harley Quinn, I like mom better!|
|Killer Style||I like the same clothing as Mom. Except my hair is Blonde.|
|Freaky Flaw||I'm Arkham crazy. Just like my parents.|
|Pet||My pet canary, Giggles. I got her for my birthday.|
|Favorite Activity||I like to pull pranks on others, including my siblings.|
|Biggest Pet Peeve||My brother, Hershall...|
|Fav School Subject||Phys Ed. I'm very athletic, like mom.|
|Least Fav Subject||Study Howl, doesn't everyone hate that???|
|Favorite Color||Red and Black.|
|BFFs||Maci Freeze, Charlotte Dent, Mertensia Bella Isley, and my sister, Hailey Quinn.|
|Holly Quinn's Diary|
Holly Quinn is the daughter of The Joker and Harley Quinn.
Holly lives with her parents in a house that looks like a fun house. She has 11 sisters, Hailey, Harper, Spade, Clover, Jessica, Jane, Jennette, Hannah, Jessy and Jasmin,Scarlet and 1 brother, Hershall. She also has a foster sister named Elise.
Just like her sisters, Holly mostly hangs out with the Gotham Group. Her best friends are Maci Freeze, Mertensia Bella Isley, and Charlotte Dent.
Holly has a rivalry with Damien Wayne, not only because of their fathers' rivalry, but because Damien refused Hailey's love.
- Holly is voiced by Kath Soucie.
- Her full name is Holly Henrietta Quinzel.