Gennul

Gennul (ジェンヌル) is the spirit of spiriting away.

Appearance
Gennul has the appearance of a wolf with wings.

History
Gennul was born from the rumors and folklore of people being spirited away. The rumors also state that those who were spirited away are either hidden at the world's border or inside Gennul after being eaten. The spirit wolf can then bring them back when it needs to.

At the Spirit School, Gennul takes away those who failed their tests in order to take make-up classes.

Great Spirit Arc
Gennul spirited away the demons from 2,000 ago by the time Anos' party arrived to the Spirit School to meet with them.

Spirit King
The Hidden Wolf is the Spirit King's watchdog. If he gives the order, then Gennul will return those it took away.