Not a character, but a location-- one ever-shifting, never quite in the same place twice.
The Night Carnival, as its name suggests, only appears during the nighttime, though signs of it are present during the daytime, either as it travels or as its settling into the day's chosen location. By day, one might see an abandoned field or lot suddenly guarded by a pack of Dead Zone Direwolves. They do not attack, but their presence tends to keep any busybodies out of the way as... well, clearly there's some kind of setup, but the carnival site appears stark empty until the second night falls.
At that time... it's truly a marvel, all other feelings aside. It begins with a voice calling through the night, deep and booming to every resident, no matter how widespread the area might be. And while some will ignore, to many... it is compelling. At least enough to take to the streets, and there... there, is a sight to behold.
It begins with three griffins, unlike any known through the rest of Eldemore, pulling a caravan so black as to be made from the void itself, marked only by a strange, luminous red rune on the back. Upon it stands a man, calling out to those who wish to witness the event of a lifetime-- no two shows will ever be the same, even if you find the carnival again, they even are somehow performing the same sequence of events and stunts, it will never be the same as what you will see tonight. Behind this man is a parade of other caravans, creatures rare and ghastly-- Foo Dogs and rotting Rune Drakes, some even swear to have seen a quintet of Basilisks within the throng. Those who do wish to see are compelled to follow the strange parade, the man now leading in strange songs, until they reach the chosen site.
The empty space is filled then, with grand tents and stalls of games, of merchants selling food and trinkets and very often creatures, ranging from runes to glasswork dragons, Drake eggs and Foo pups and everything in between; creatures the like never seen before or thought to be in this world no more. Truth be told, the setup is quite beautiful; the tents decorated with brilliantly glowing runes and strange scripts in every color of the rainbow and seem to shift each blink, the games in fact fair and the prizes quite nice (mostly plush toys, though some indeed award creatures or strange items)... even the creatures being sold seem to be in excellent condition, though it's best not to question beyond that. The smaller tents all host a curiosity-- a truly unique creature, performers going through practice routines, singers and jugglers and fortune tellers, sometimes simply a lone figure telling a story of ages past.
In time though, the crowds filter into the grandest tent, astonished to find that for as huge as it might appear outside... within, it's even larger, the canvas walls pitch black and dotted with luminous, shifting red stars all throughout.
In a flash of red light, the ringleader appears, golden eyes shining ever brighter in the gloom as he shares his delight that so many have come. That while he regrets this is all he can do in the current situation... he hopes that it might be enough to keep spirits up; that until the dawn comes? There is no blight, no corruption, no curse of Oblivion. There is fear, oh yes... but this is a fear they experience on their terms. That in this night, they are safe and free and equals all, bearing no obligation but to enjoy the show.
No one is ever truly certain how the show ends, at least no one in the audience. To them, the last act finishes, the performers take their bow, and the ringleader takes center again to speak... and then they are in their homes, watching the first rays of sunlight peer over the horizon; and the site as empty and pristine as it was the day before. Yet anything purchased or won that night remains... though not every attendee does. It's rumored the price for the Night Carnival is a few unlucky souls, but in truth? One might see them again, should they ever catch another show...
(The Night Carnival is a production run by none other than the Chaos Ancient Nyarlathotep; his attempt to reconnect with a world in turmoil that he is forbidden from directly interfering in. However, he hopes that the carnival can foster some happiness and joyful memories for any who attend, and he is always willing to take in those who wish to be part of the show themselves. He'll never say where the creatures who assist in the shows are from though, just that their proper owner is out of the story for now and he'll take them right back once they're around again...
The Night Carnival is an open location, you are free to include it in your characters' back stories/current story!)
Characters of mine involved in the carnival:
-Nyarlathotep
-Calliope
-Eleanor
-Chani
-Maybe Lore?
-Literally every single one of Shepard's pets except for Amethyst (and maybe Paine) now