Styrkaar of the Sortsvinaer
A Chaos Champion of Slaanesh from Warhammer Fantasy.
The Legend
Born possessed by a Daemon named Sle'zuzu (that's as close to Exorcist as this will get) to the Norscan chieftain Svengor of the Sortsvinaers tribe. His head roommate guided him to greatness leading raids even at a very young age. When Svengor insulted him out of jealousy at a post-raid feast, Styrkaar simply killed him and assumed leadership of the tribe. This act merged Sle'zuzu and Styrkaar together, and he/they immediately ordered the construction of a statue of Slaanesh (who Norscans call Shornaal). Afterwards he lead his people against other Warriors Of Chaos following all four Chaos Gods. After killing the greatest Slaaneshi Champion, Vandred, Styrkaar was confronted by Archaon. Vandred had been Archaon's lieutenant in charge of the Slaaneshi forces of the world-ending army, and Styrkaar immediately pledged himself as Vandred's replacement which was accepted by Edgemaster SupremeArchaon.
Styrkaar was used during the Storm of Chaos invasion. He only managed to sack two towns, Kurst and Zundap, and required the help of the Skaven in taking the capital city of Hochland called Hergig (feel free to make either furry jokes or ass hamster ones as per your personal taste). Due to the Slaaneshi penchant for constant celebrations over every minor victory which are exponentially proportional, the Slaaneshi forces didn't even show up for anything important in the event.
Styrkaar's model was squatted not long after the campaign was retconned, and in the lore he was replaced with Sigvald in 8th edition who is basically him but prettier and without the Daemon.
The exact implications of Styrkaar and Sle'zuzu are not clear. The lore clearly states they merged rather than Styrkaar's soul being consumed or him being a halfbreed like the Glottkin, so technically Styrkaar is a Daemon (if not a roudnabout way of becoming a proper Daemon Prince who simply dwells in his mortal body for now. Taking into account the implications that Storm Of Chaos was only a potential future that Be'lakor rejected and changed with his bullshit time travel powers, but the Warp is timeless, then Styrkaar still exists in the End Times and Age of Sigmar continuity due to the timeless omnipresent nature of the Warp. That being said, he'll almost certainly never be mentioned again and its loose logic anyway, and the character does not have a noteworthy fanbase beyond those who like the model.
Crunch
Generic model, so whatever stats you want him to have.