Arin betrayed The Ninja and he might fight them at some point in Season 3 Dragons rising. I know he didn't do anything evil yet but I know he's gonna be a villain cause I can tell by him being on the Season 3 poster's villain side and there's rumors about him fightning Sora.
This image he might be fighting one of The Ninja. And the fact he said he thinks still good, he's like a misunderstanding villain.
