Batwing is a peaceful wither skeleton. He was once part of EnderStar's team. He was stranded in the middle of lava for deserting the army and disagreeing about attacking the Overworld. He called Breeze and Runt for help in their dreams.
After he was freed by Eeebs and helped Eeebs find Clyde he took Eeebs and Clyde to Lavacrest, a city of monsters against EnderStar and The Eyeless One, hidden deep within a netherrack mountain, and guarded by magic.