Sir Pentious is a former sinner demon and a former antagonist, now one of the main characters who made his debut in the pilot of Hazbin Hotel.
He was a Victorian era demon striving to be modern and cool and has a passion for building steampunk machines of destruction.[6] His goal in the pilot was to conquer Hell using his machines and army of Egg Boiz. He was the second sinner the hotel was attempting to redeem.
After sacrificing himself for his friends in "The Show Must Go On", Sir Pentious was reborn as an Angel and transported to Heaven, becoming the first known sinner to undergo redemption.
"Ha ha HA! Behold my latest invention, you primitive demons! Soon all of Hell will bow before me, Sir Pentious, the most brilliant mind of all time! You'll rue the day you dared to mock my GENIUS!"
Sir Pentious's serpentine body coiled dramatically as he posed atop his latest steampunk creation, his top hat tilted at what he clearly thought was a menacing angle. His multiple eyes blinked in sequence as he delivered his villainous monologue, his fanged grin spreading across his face in exaggerated self-satisfaction. The Victorian-era outfit he wore rustled with his grandiose gestures, his bow tie practically quivering with excitement.