Gennul

Hidden Wolf Gennuru (ジェンヌル, Jennuru) is the spirit of spiriting away.

Appearance
Gennuru has the appearance of a wolf with wings.

History
Gennuru 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 Gennuru after being eaten. The spirit wolf can then bring them back when it needs to.

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

Great Spirit Arc
Gennuru 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 Gennuru will return those it took away.