Sky King

The Sky King (空の王, Sora no Ō) is a monster that rules Grace sky.

Appearance
It resembles a giant sparrow.

Personality
The Sky King is a territorial bird, it is especially attracted to jewelry or shining items.

Background
It's a giant beast that rules the sky. Six, Lilith and Snow fought against it.

Trivia

 * Lilith used to have a pet sparrow.