I think I might have lost an unlocked character.

KairiRhien

I thought I had previously unlocked the Ewok Elder, but I don't think I did anything to upgrade him so I can't remember for sure. I have completed the unlock 26 light side characters achievement, but only have 25 light side unlocked in my roster.

I'm not saying I for sure unlocked him, but I really thought I had got him from a card pull. I would have remembered farming for him, that's why I'm not 100% sure.