Silas

Silas Dreemurr was the king of the underground and main antagonist of the Red King AU/arc.

Appearance
Being a boss monster, Silas appears as an anthropomorphic caprine with soft white fur and long, drooping ears. His horns are abnormally short and have a bent angle to them. He has a long, flowing golden mane, and is typically seen in dresses, gowns, or other effeminate clothing. He also has an affinity for makeup, having over-exaggerated blush on his face and bright red polish on his manicured claws.

Powers
Silas, like all other boss monsters, has the ability to cast fire spells. His fire in particular is much more potent than previous boss monsters, likely to compensate for his physical weakness. While not technically a power, he is best known for his skills of psychological manipulation, which he uses to gain near total control of those around him.

Personality
While it is implied Silas was once kind in his youth, during the events of the arc he is shown to be a ruthless totalitarian ruler. He keeps up a chipper, almost flamboyant act around those he seeks to manipulate, but to others he is a cold and uncaring dictator who will stop at nothing to get his way. It is likely he even takes pleasure in his conquest due to his extreme hatred of humanity.

Relationships

 * Asriel Dreemurr (Brother, co-ruler of the Dreemur throne)
 * Toriel Dreemurr (Mother, deceased, passed of old age)
 * Asgore Dreemurr (Father, deceased, passed of old age)
 * Prince Auceline (War captive, later lover, and eventually murder victim)
 * Undyne (General of his army)
 * Alphys (Head scientist, involved in multiple studies to further his conquest)
 * Estella (Intended to be his "secret weapon" as a supersoldier, but later turned against his plans)

Red King
In the Red King arc, Silas himself was the arc's namesake and served as its primary antagonist. He was crowned king, alongside his brother, after the passing of the previous Dreemurr monarchs. His ambition and malice quickly became apparent as he spent the next centuries preparing his people for war, filling their minds with the same hatred he possessed for humanity. Silas claimed that humans were a species born of evil, unlike the natural goodness of monsters, and had wrongfully stolen the earth from its rightful rulers. After gathering enough human souls to destroy the barrier before the arc's beginning, he sought to wipe out the human race in order for monsters to take back the surface world. With help from several rebel heroes, he was later slain by Holo Prosper, leaving his brother Asriel to take the throne and usher in an era of peace.

Trivia

 * Silas existed as a character concept for several years before his final debut on UH.
 * Silas is heavily implied, by his own claims, to be a reincarnation of Chara from an alternate timeline.