Harper appears as a normal Seal, with round puffy cheeks. They are depicted with solid-colored eyes and thin eyelashes. They also have a large pointed nose, thick markings underneath their eyes, and a little tuft of fur on their head.
- Their primary statue, the Harper Statue, is sold at the Mystery Emporium.
- Their name comes from the English origin meaning 'Harp Player'.
- Their name could be based on a type of seal, the Harp Seal.