The sixth mystery representative’s true identity is Shinigami-sama. It is the final mystery revealed out of Kamome Gakuen's Seven Mysteries.
The rumor begins with an event called “Tsukimachi” where children gather together weaving baskets all night until sunrise.
The children have to stay awake the whole night or their souls will attract The God of Death.
The aspect the Sixth School Mystery oversees in Kamome Academy is currently unknown.
He appears to have a human-like form after removing his mask, with a dark skin tone, short hair, and horns still protruding on either sides of his head.