a talented pianist who was tricked into making a contract with a devil by the Mayor Russell Burrows that resulted with the loss of her four limbs and almost got killed. Seeking vengeance, Noel made a second contract with Caron, the same devil who took her limbs, to stop Russell's ambition. Her official demon title is Witch of Mortal Fate.

the main protagonist of Noel the Mortal Fate game 

Hastur (also called The Indescribable, The King in Yellow, He Who Must Not Be Named, Assatur, Xastur, H'aaztre, or Kaiwan) is an entity that is part of the CCthulhu Mythos universe by author Howard Phillips Lovecraft.

The yellow King 

Nyarlathotep is a primordial god. It appears in a large number of his stories and is apparently a large polypous mass with a long red excretion. However, it is characterized by adopting various forms according to its claims.

El Caos Reptante - The Crawling Chaos

Originally an actor of the Golden Age, with erratic and theatrical words and deeds while being grave in nature. Previously highly active as an Ascendant in various regions of the world. After a series of extenuating circumstances, his body was severely damaged. Re-sculpted into his current shape by a certain surrogate.Roland treats battles as mere games. Extremely powerful, he has once obliterated multiple Constructs squads by himself.

Ascendant

main protagonist of Hitoribocchi no Isekai Kouryaku series.