Helios

Helios is the guardian priest of Prince Endymion and lives in Elysion where he prays alongside the Maenads. He is cursed by the Dead Moon into the form of a Pegasus. He is one of the main characters of the Dream arc in the manga and crystal. Helios is the high-priest of Elysion during the Silver Millennium when Prince Endymion ruled the Golden Kingdom of Earth. Helios remained in Elysion at the shrine along with the priestesses, the Maenads, when Endymion left for the surface. He is the Prince's guardian priest and this connection to Prince Endymion and the Earth and his own connection to Elysion makes all four entities connected. (You are a member as Sailor Scout and Helios comes and assist you)