It's a Naminé button. The artist is FauxyDoodles(https://x.com/TheFauxsynder)

It's a Riku button for Final Mix: A Kingdom Hearts. The artist is ????

It's a Garnet pin. The artist is Shayneryanart(https://linktr.ee/Shayneryanart)

It's a heartless button. I bought in Halloween Town.

It's a Gamora, Rocket, and Yondu button. The artist is Injuredreams(https://injureddreams.bigcartel.com/)