Harry is a light-skinned muscular boy with brunette hair. His primary outfit is a white ripped tank top showing his abs, a red leather sleeveless coat, black pants with red ripped details and zippers and dark brown boots. His accessories consist of a black pirate hat with dark golden details, pale feathers and his pirate gang's symbolic pin, a black band, black fingerless gloves, a golden skull ring, red sleeve-like bracelets, red and black belts, a sheath for his sword and a silver hook.
- "What's My Name" (with Uma and Gil)
- "It's Goin' Down" (with Mal, Evie, Jay, Carlos De Vil, Ben, Uma and Gil)
- "Kiss the Girl" (with Mal, Evie, Jay, Carlos De Vil and Uma)
- In the novel Descendants: Isle of the Lost there is a character known as Harriet who is also the daughter of Captain Hook. Whether CJ and her are the same person or siblings currently remains unknown.
- Harry is part of Uma's pirate gang.
- Harry has a hook on his left hand just like his father.
- It's possible that his hand was bitten by one of Tic Toc's offspring.