When Wangzhou was a child, he was given a daruma figurine as a present. His mother gave it to him and told him it would make all his wishes come true. He grew up, but he never let go of his daruma. When he became the Corrupted Emperor Yaoguai Wangzhou, he went back to his old daruma, manipulated it, and brought it to life. Now Dark-uma is a genie at the service of the Emperor.

Dark-uma is a Dark Tank with Healing and Regeneration who can remove negative effects from allies and give them random positive ones. Dark-uma has an Evolving Trait: at rank 0, he has Taunt, at rank 1, he is Hardened and at rank 3, he'll give a random positive status effect to all allies at the start of the battle.