'I am King Cainzerus Shadowkin, but just 'Cain' will be fine.' -Cain, Series V, Chapter 149

Appears in: Series V, Chapter 149-150

Known as 'Cain' for short, this tree-like Demon is King of the Shadowkin. He has a human-like face, with dark purple hair and light purple eyes, but the body of a large tree and shadowy tendrils. The inside of his trunk resembles the inside of an animal. After the Shadow Realm was destroyed, the gang helped transport him to safety.