天河司, First King
He was the first Kings Chair of the Guardians and their founder. Manages the planetarium as a parttime job. Artist of the artbook Kokoro no Tamago The Hearts Egg. Looks similar to Tadase. At first he is thought to hold the Humpty Lock. A cat lover and has a liking for Ikutos cat ears. He plays as a minor character but seems to have a bigger role in the story considering that it is he who assigns the Guardian Chairs and is often seen counseling Tadase.