Duke Sliscus

Yeah, he's kinda weird like that

Duke Traevelliath Sliscus (Better known as just "The Duke" or "Sliscus the Serpent") is the Dark Eldar's swashbuckling Pirate King and their answer to Prince Yriel as top space pirates, acting as the posterboy for exiled Dark Eldar who want to do what they want 'cuz a pirate is free(a popular theory is that he is Yriels father, given the mystery as to how the Iyanden craftworlder was concieved). He is a typical Dark Eldar, but with the talent of a Shakespearean wordsmith, carving poetry into his prisoners bodies after injecting them with every poison known to man. He leads the best corsairs in the galaxy, known as, "The Sky Serpents".

This is how Lady Malys describes the Duke,"amoral, despicable and impeccably dressed into the bargain".

See, Sliscus was originally just some pencil-pushing something-or-other within Commorragh. However, he decided that boring shit sucked and then stole three ships from Port Carmine and begin his corsair warband, the Sky Serpents. And so he's stuck on for a few thousand years, which must be a testament to his skill as a commander of a legion of backstabbing bastards in his megalomaniacal vision to take over the galaxy behind a certain armless failure, a rotting psychic vegetable, and the Tomb Kings IN SPACE.

Not like that didn't affect his sanity, though. The guy's got serious moodswings which manage to have some hilarious effects that he might have learned from the legendary Assholetep. For example, he decided to parlay with some planetary government, and then decided to butcher all of the Hive Nobility because their envoy mispronounced his name. Like an asshole. Also, to add to his Megalomania, he is pretty paranoid, feeding himself various poisons to build up his immune system. He also has a thing for wearing different clothes every single day to the point that he'd never wear the same set twice, and makes clothes that have parts of the last person he killed in them. Apparently his banner is also made from the flayed skin of the Lord Admiral of Segmentum Tempestus' Segmentum Fortress. Sliscus has also been said to be amused by being called a serpent; he considers himself more dangerous than any animal and thinks that "serpents" should be renamed "Sliscus' " after him instead of the other way around.

Sliscus is also a Warhammer 40k drug lord. He has access to all the best combat drugs and poisons, which are reflected in his rules, which buff himself and the army. He's also the second-most pimping Dark Eldar after Asdrubael Vect. In the 5th edition Dark Eldar "...he has his skin scrubbed thoroughly by teams of concubines every time he shares breathing space with a lesser species." and there are two reasons he's implied to be very popular with the Wych cults (and only one of them is his drugs). So not only does he kill your army, he sweeps your girl off your feet and shows her a better time than you ever gave her. He's also the only one to successfully countertroll Lukas the Trickster, and even ripped out one of his hearts, either for kicks or because he hated those fucking yiffs.

Dark Eldar Lords and Ladies
Asdrubael Vect - Archon Tahril - Baron Sathonyx Drazhar - Duke Sliscus - Kheradruakh Lady Malys - Lelith Hesperax - Urien Rakarth