N'Kari
N'Kari is either a Keeper of Secrets or a Daemon Prince, depending on if you're reading newer or older fluff. She/He (either works, but since Keepers of Secrets are hermaphroditic, it doesn't matter) is notable for appearing in the canon before his/her backstories even happened, as well as swapping her/his Warhammer Fantasy and Warhammer 40k backstories around between the two universes and thus is the primary evidence of a multiverse connected to the Warp after the map of the Realm of Chaos.
N'Kari's name is taken from a character in one of the Soloman Kane novels by Robert Howard; the villain Queen Nakari, "The Vampire Queen of Negari"
The Legend (Warhammer Fantasy)
In Warhammer Fantasy, N'kari was a High Elf in the Cult of Pleasure who found a patron in Slaanesh (as Slaanesh is less inclined to eat Dandelion-eater souls as he is to make them into Daemonettes in Fantasy). N'kari usurped the position of Dechala as Slaanesh's favorite, and has corrupted many mortals since then, and is the one who commonly sends messages to Slaanesh's mortal champions. Thanks to the time fuckery of the Warp however, she managed to predate herself and was a powerful Keeper of Secrets from primordial times that fought Aenarion the Defender a couple of times then got trapped in the fabric of a magical vortex created by Caledor the Dragontamer and friends to block Chaos from the World. She eventually got out and to her props even Malekith was on edge about the whole thing. She proceeded to wreak unspeakable carnage in Ulthuan, hunted Anarion's descendants, and tried to destroy the Shrine of Asuryan, but that last one didn't work out too well. As a result N'Kari has played Saturday morning cartoon villain to the T&T twins (Tyrion and Teclis) ever since, appearing and taunting them, getting an asswhooping (and a corpse-humping from Tyrion most likely), then popping back into the Warp while shrieking about how he will be back and they won't be so lucky next time until the next time actually comes which ends up as just a rinse/repeat of the last time.
He also made an appearance in Warhammer Online standing in a fountain staring at the sun, but whatever.
40k Version
According to latest studies, N'Kari once was a human, native of Old Earth, an actress of dubious morals, going by name of Sasha Grey. Such was the power of lustful pleasure associated with her that eventually the warp reflection of her soul transformed into a sentient being of unimaginable passion and lust. After the realization of her own existence, she instantly sensed the perturbations in Warp, which was the formation of Slaanesh and immediately recognized it as her future master. N'Kari then patiently waited for the birth of the new Chaos God and totally and undoubtedly gave herself to him. She did some funky stuff after that and also, was at Horus' Battle Barge at the final moments of the Siege of Terra, where she was banished by no other then the All-Mighty Corpse Emperor, and was sent back to Slaanesh to have a rape party afterwards.
Also fought the Phoenix Lord Asurmen during The Fall killing him for the first time because his backup, Drastanta Phoenix Lord of the Shining Spears was out getting smokes, but Drastanta showed up and blew N'kari with his lance.
She also was doing some scavenging on a derelict Craftworld, called Malan'tai, where she was "Om Nom'ing" the Eldar Spirit Stones, until some of those retarded SUPER KNIGHTS OF THE EMPEROR swooped in, kicked her demonic servants, then got their asses kicked by N'Kari until something random happened, and she was defeated.
There isn't that much fluff behind her, but we can all assume she's generally badass, or not that badass, like any other Keeper of Secrets, but as they are Greater Daemons of Slaanesh, they're badass, but not as badass as Greater Daemons of other Chaos Gods. any truly interested person surely can find some really cool videos of her human times, though one wonders what would happen if she saw this page.
It is rumoured the Fifty Shades trilogy were some of her daydreams kept in(she/he/shim?) It's a diary before N'kari's ascension to daemonhood and that the foul heretic E. L. James (who is secretly an ardent devotee of Slaanesh) found them and decided to spread them in preparation for the corruption of humanity by She-Who-Thirsts. The Inquistion has a standing order that all copies of these obscene texts and anyone who thinks they are actually novels and not the steaming piles of foul heresy they are must be shot into the heart of the nearest star straight away. Unfortunately, N'kari has grown even more powerful as there is now a Fifty Shades of Grey movie.
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Now in proper model form!
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N'kari, after having been jerked off by the assembled heroes of the Warhammer World.
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N'Kari, doing something random like every Greater Daemon. Today, she's turned herself into wireframe.
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The stock Forgeworld Keeper of Secrets, which is pretty much N'kari. Even if you field more than one, it's just N'kari twice. She's that much of an attention whore.
