Note that I have changed my nickname from DemonSurfer to the moniker Nereus. For those wondering about the terminology, a moniker is a pseudonym which one gives to oneself, whereas a nickname is generally given to one by another, and not chosen for oneself.
Why Nereus? Because of his character, his relative obscurity in mythology, and also because I just liked the name. Nereus, in Greek mythology, was a Titan - a wise and gentle sea-god, and the eldest son of Pontus and Gaia, the Sea and the Earth. Nereus, also known as the Old Man of the Sea, had the gift of prophecy and could change himself into any shape, and was known for his truthfulness and virtue:
But Pontos, the great sea, was father of truthful Nereus who tells no lies, eldest of his sons. They call him the Old Gentleman because he is trustworthy, and gentle, and never forgetful of what is right, but the thoughts of his mind are mild and righteous. — Hesiod, Theogony 233
In the Iliad, the Old Man of the Sea is the father of Nereids, though Nereus is not directly named. He was one of the manifestations of the Old Man of the Sea, never more so than when he was described, like Proteus, as a shapeshifter with the power of prophecy, who would aid heroes such as Heracles who managed to catch him even as he changed shapes. Nereus and Proteus seem to be two manifestations of the god of the sea who was supplanted by Poseidon when Zeus overthrew Cronus.
Attic vase-painters portrayed Nereus with a human torso issuing from a long coiling scaly fishlike tail, often wielding a staff of authority. Nereus was also shown in scenes depicting the flight of the Nereides as Peleus wrestled their sister Thetis. In Aelian's natural history, written in the early third century of the Common Era, Nereus was also the father of a watery consort of Aphrodite named Nerites who was transformed into "a shellfish with a spiral shell, small in size but of surpassing beauty."
Nereus dwelled with Doris and their daughters, the fifty Nereides, in the depths of the Aegean sea. He had a temple near Trachin in Thessaly (Metamorphoses I, 177-198; XI, 346-409).
