Cathedral

known as the Gray clan, is a clan that was devastated during the Kagutsu crater incident, the only survivor being the Grey King Seigo Ootori, (鳳聖悟 Ōtori Seigo) who then went into hiding, changing his name to Tenkei Iwafune, an admin for the Green Clan Jungle.

History
At the time, the young Seigo Ootori established CATHEDRAL, which later became the second most influential clan, with the Gold Clan being the first. He came to be greatly respected by both his clansmen and ordinary citizens. CATHEDRAL's last goal was to prevent the Kagutsu Crater incident, but this failed and all of CATHEDRAL's clansmen were killed with Seigo being the only survivor of his clan. Tenkei Iwafune amongst the destruction after the incidents of Kagutsu Crater had discovered young Nagare Hisui, despite his heart getting pierced through by a chunk of cement debris it was then that Nagare's power as the Green King awakened, his Sword of Damocles appeared in the sky and his life was preserved.

Aura
Clansmen of CATHEDRAL use the fog sanctum, able to create fog and mist. This aura is regarded as having the characteristic of "absolute defense".