The Emperor is a great king of the past, accidentally summoned by a wayward shaman. No one knows his real name. He always wears a mask on his face, never takes it off, perhaps it is his face. The mane is decorated with beads and pale blue feathers.
The character is soft, reasonable. The Emperor will always find a peaceful way to resolve the situation. A pacifist.
It is possible that he can travel to the sky and back.