Erebus

"You really thought... I would die from that?"

Erebus, introduced under his fake alias Trevmi, is the Primordial of Darkness and the King of Hell, known as the Lord of Shadows. He faked being the God of Death at the beginning before his true identity came to light. The vessel for his powers is the half-elf Mavi Elnich. He is the lover and uncle/great-uncle of Keres Almyra, being the son of both The Void and God.

Appearance
In human form, Erebus has sharp facial features, and a lean/muscular build. His whole demeanor is normally serious and intimidating. When fighting enemies or when in use of his powers, Erebus' eyes glow of a pale blue. In some cases, an ominous aura seeps from Erebus alongside dark lightning. This is displayed in moments when Erebus is enraged, such as when he found out what Cain had done to Deyanira.

Personality
Trevmi, or Erebus as his true name is, is a being so old that the usual concepts of "good and evil" don't apply to him. Erebus acts in whatever way benefits him, as he considers his existence above all other beings, with only the other primordial beings as exceptions.

Background
Erebus is one of the primordial beings, entities that have existed since the birth of the universe. He came to Tyrth an unknown amount of years ago, and took the position of Tyrth's God of Death, adopting the name "Trevmi" after making a deal with the Goddess of Death, Hela. Erebus is the Lord of Shadows, and does not only deal with the new arrivals to hell, but he also keeps the void in check so that it does not open and release the shadow dwellers. Should the void ever open, it will be the end of Tyrth.

Trivia

 * The name Erebus (Ἔρεβος) means "nether darkness". Meanwhile, the name Trevmi may come from the Latin trivium, meaning "three streets", because there were three streets all leading to the current Piazza dei Crociferi, a square next to the modern Trevi square in Rome.