In The King In Yellow by Thom Ryng, Hastur is the name of the planet on which the city of Yhtill is located. Compare Carcosa (planet). The anime Haiyore! Nyaruko-san has a planet named Hastur. Appropriately, it is home to the Hasturians, an alien species of which Hastua (one of the main characters and the humanized form of Hastur) is a member.