Melody (both the fandom version of him and the non-fandom one) is an artist! He particularly enjoys painting, but will use pretty much whatever art supplies he has in hand just to get his creativity out on paper. It's one of his favourite ways to express himself, and he has quite a way of always finding some avenue to draw, even snatching a little notebook from the gift shop and hiding it until it's been used enough that the staff know it'd be pointless to take it away from him at this point.
He also writes poetry and little snippets of dialogue and stories! Doesn't have the time to write something super long, but he does enjoy writing prose or just being a bit flowery.
He's just, a very creative person who would probably be significantly less happy if he hadn't picked up these hobbies.