Grumpy was one of the original twelve apostles of Jesus Christ. As his name suggested, he was quite the ornery son-of-a-gun, and was constantly doubting Jesus's expounding of the Jedi Code. When Jesus
rose from the dead survived his crucifixion, he even doubted this incredible feat. It was only when Jesus lifted him twelve feet into the air with the Force that Grumpy stopped being such an ass.