Erebus' only known form. Possibly his avatar.
Erebus, also known as Erebos or Scotus, is the Primordial god of Darkness and Mist, one of the original primordial deities, and second ruler of the cosmos along with being a child of Chaos. His wife, Nyx, was also his sister. His two children whom are well known through Greek myth include Hemera, the Protogenos of Day, and Aether, Protogenos of Light, an ironic fact that the day and light would be the children of night and darkness.
While he is featured little in Greek mythology, he is known to have fathered several other deities with Nyx; depending on the source of the mythology, this union includes Aether, Hemera, the Hesperides, Hypnos, the Sisters of Fate, Geras, Styx, Charon, and Thanatos. In Greek literature, Erebus is also used of a region of the Greek underworld where the dead pass immediately after dying, and is sometimes used interchangeably with Tartarus.
Erebus has no physical form, as such it is highly difficult to interpert him in an appearance. Like Nyx can only be seen as the nighttime sky, Erebus on the other hand can only be witnessed as the shadows and darkness that lurk about and leak in the nooks and crevices of the world itself. However, Erebus is capable of taking a form, although not physical, but a spectral one. Although, it is believed that this form merely acts as his avatar.