One of the for pillar gods and the reason for the appearance of most of the Len characters through the series. He was a lonely boy who often was ostracized for his crossdressing habits and fascination for girl's stuffs.
Disciple of Held Yggdra, he eventually researched about the body of the creatures and developed a method for creating humans.
Originally from the First Period, he had a connection to the developers behind the Second Period virtual world and had his original avatar, Levia, be a woman. After being contacted by Levia during the events of Barisol no Kodomo wa Hitorikko, he created another male avatar in the Second Period and claimed to be Levia's twin. His original body was responsible for bringing the refugees from the ruined Second Period out of the virtual world and into the ruined First Period upon which the Third Period was constructed. He is the true Master of the Heavenly Yard.
After the events of Kiseki no Yukue, he reincarnated into the body of Elluka Chirclatia alongside Levia, remaining dormant inside her. After the Battle of Merrigod Plateau which resulted in the creation of Ma, he was blasted into the Hellish Yard, from which he travelled to the Heavenly Yard.
After reincarnating Allen Avadonia as Kokutan-douji, he is ordered by Sickle to bring the Irregular back to the Heavenly Yard, leading him to take up the identity of Tsukimoto Bufuko while in Jakoku.
