I think Harry is a softie and plays some kind of instrument, like a guitar, like he enjoys singing softly while playing on it or smth. Using music as a way to express his feelings, especially when he's alone or bored🎵

I've recently rewatched Descendants 3 and my headcanon is that Harry was jealous when he heard about Uma's journey behind barried and the first thing when it went down was him sailing across the waters searching for some kind of treasure along with things Uma did. And I think he'd take Gil with him

colorful whale sharks 🦈

Sharks are cute 🦈