The Original Series

No one’s saying in the setting you’re playing in goblins can’t be evil as a default. Having it be a blanket truth for all settings is a bit constraining though. Goblins specifically in the DND world probably shouldn’t all be evil alignment because their history is… Complicated

Pointy hat has a good video on it

The armor looks like it’s Caeda’s from Fire Emblem. https://fireemblemwiki.org/wiki/Caeda