Yabunkamui

"You do know what happens when you fail, Keitaro."

The ruler of the Underworld, and quite a piece of work indeed! Yabunkamui was once part of the Zigoton Twin Deities, of which he used to hold dominion over the moon and nighttime. He and Itoukamui, his older brother both ruled over the Zigotons for many eons, but over time felt unsatisfied with his position, as well as a newfound jealousy towards his own friends during the golden age of the four tribes under a council he was part of. Taking these factors in hand, added by two of his friends becoming intimate, he hatched a nefarious plan to separate them by corrupting artifacts belonging to one of them, accusing her of doing so, and cause her partner to nearly wipe out her tribe in a devastating war.

His actions did not go unnoticed though, and he was punished as soon as his former colleagues found out the truth. Now cursed into demonhood and forced to live in the Underworld, he becomes its ruler and has been scheming many evil deeds ever since, some of which succeed. However, many of his plans begin to fail, and this is enough to frustrate him every now and then.

Rumors are afloat that his battleaxe, the Omukade is forged from the very hostile elements of the Underworld. Enough hits may or may not send someone into a horrible poisoning episode, which can lead to death without a very specific medicine, or if one cannot afford it, a method of healing...