Here's Liiz, Harold and Harriet's one and Only child.
Elizabeth "Liiz" Roxby is Harriet and Harold's one and only Daughter, but despite the Facf she does get along with her Parents when dating Mallow Nimbus, the Prince of Nimbus Land, but his Parents didn't like Liiz that much at first thinking that she was a hooker, but Harriet already told King Nimus that she doesn't lose virginity unless she is married. She does treat Vivian McDark as a sister though, despite that she's a single child. She was also horribly disfigured in a car crash with Bowser.