Lord Lemmistas “Lemmy” Thastalis the Stimulating

Thastalis was the proud, flamboyant, and awful leader of The Emperor's Children and captain of The Orgasmatron. He was known for making tasteless sex jokes and infamously raping a female centipede heretek named Mariannax Vatali. He knew no boundaries but when things came crashing down he killed himself in the hangar as genestealer cultists infiltrated his ship.

Childhood and Indoctrination into the Adpetus Astartes
As a child Lemmistas was born on Chemos. His father was the bastard son of a wealthy musician and a groupie. For most of life he lived with his mother and her abusive boyfriend. Her boyfriend used to abuse young Thastalis. His step father would do extremely bad thing to him while his stepfather was drunk. But one day as the then 12 Thastalis was playing outside he was encountered by a group of Emperor's Children approaching him. They remarked about the young boy to each other and took him in so that he may become an astartes. He was taken in and indoctrinated.

Lemmistas during the Great Crusade and Horus Heresy
Lemmistas was a slightly important figure of the Emperor's Children as he flirted and manipulated his way to the top to the point he became a captain. He hooked up with several famous members of the Emperor's Children like Lucius the Eternal. Lemmistas was present on the Laer Campaign, he killed his loyalist brothers on Istvaan III, watched as Ferrus Manus got decapitated on Istvaan V, and killed a large amount of innocent people during the Siege of Terra. After the Dropsite Massacre he noticed a Raven Guard stowed away on their transport. That runaway Raven Guard was spared by Thastalis. The traitor raven guard explained to Thastalis that he was a former Librarian that wished join the forces of the Emperor's Children as an Adviser for Lemmistas. That traitor raven guard became Sorcerer Vainious the Parrot. Through the Heresy he was known as a massive degenerate. Which is something that will follow him.

Post Heresy
When Thastalis and his men retreated into the Eye of Terror he went on to take ownership and made them into strongholds and places of worship for followers of slaanesh. After that he went around with his men to pillage loyalist worlds to enslave and convert them to slaanesh. Along the way he found Fulgrim's flag ship "The Pride of the Emperor" and corrupted it into "The Orgasmatron".

Encounter with Lord Daroth and Joining the Crusade
Thastalis was in his throne room when he got a message from a Word Bearers fleet. They were looking for people to join a crusade against the Imperium. Thastalis ordered the Word Bearer Chaos Lord onto his Gloriana so they may talk. Thastalis became infatuated and smitten with Daroth and easily joined his crusade.

Time within Lord Daroth's crusade
Thastalis was Important due to his funding of the crusade and the fact he had a Gloriana Class battleship. Thastalis wasn't liked all that much except for select few. Jarl Thorald kept him as a drinking buddy but didn't want a drunk Lemmistas near him. Thastalis took many slaves and claimed Primae Noctis on them before handing them to the other warbands. During a visit to a small chaos sector on a slaanesh world he found a stray slaaneshi space wolf with centaur like features but instead of a horse it was a wolf. With the fact the lower half of the wolves body being a literal wolf Thastalis was instantly interested at the massive feature the wolf had. Thastalis offered the drunk space wolf food and shelter on his ship and kept it as a pet. Everything in the Orgasmatron was fun until tragedy struck in 805.M41...

The Engine Incident
In 789.M41 the Orgasmatron suddenly disappeared into the warp as a Daemonette shoved a rather happy cultist into the ships warp engines. The ship was stuck for what felt like weeks, Everyone was told to stay calm. Thastalis was trying to distract everyone with mass orgies as the engine got fixed by the warpsmiths on ship. It felt like weeks or months but finally the ship returned to the fleet.

The Return to the Fleet and Nippur
The Orgasmatron returned back to the fleet after what felt like a month, but as Lord Daroth told him it has been roughly 100 years and the galaxy had a few changes. Thorald died but a daemon world is getting transformed and so Thastalis and crew got to decorating and "Praying". Nippur was rather boring for Thastalis.

Hammer V-A
During the Nippur mission Lord Daroth called his fleet over to go over to a mostly chaos tainted system to get materials and do some snooping around. Lemmistas and Crew went to the small slaaneshi forgeworld to ask around and party. When Lemmistas and party came to the world it was perfect but odd... It didn't matter as they went to speak with the leader of the world. But the team got distracted and did some racing. Thastalis failed to buy a bike so he seduced and bribed a Noise Marine to get his bike. More faffing about happened until a heretek came down on the world...

Rape of Mariannax, the Emasculation of Thastalis, and the birth of Lady Thastalis
Mariannax was a terrifying female heretek that took the form of a massive centipede. Thastalis had an odd curiosity with her. Mariannax came down to help Vainious with his bike to make it faster. For compensation Lemmistas gave he his chest progenoids. Due to him destroying his power armor chest plate to rip out the progenoids he had be without a chestplate. Due to being a hermaphrodite he wore a bra. During this ritual to make the bike faster Mariannax went into a comatose state in her shuttle. Vainious came in and took his bike leaving the ships door open. With the door being open and Mariannax being unconscious caused Thastalis to do something completely awful. Thastalis took advantage of and raped Mariannax. But one thing Thastalis didn't realize was that he had teeth in her and so Thastalis' penis and testicles got destroyed. Thastalis left as quick as he can and seeked out the help of Vainious to heal the wound that was his crotch. His Johnson was unable to be healed but due to him being a hermaphrodite he had other holes and so he became "Lady Thastalis". Soon enough Mariannax woke up and Mariannax was suspicious of what happened while she sleeped. Thastalis was bullied by Mariannax and Vainious to the point he broke down and cried. Soon an announcement was sent to the slaaneshis.

Escape and Evacuation from Hamer V-A
The Alpha Legionnare "Secretarius" sent a warning that the world is going to get destroyed. Mariannax and Thastalis left with Captain Deadsky, Vainious, and Viggo.The team came to The Orgasmatron and started planning to save the people on Hamer V-A. Thunderhawks and Stormbirds led by Vainious rescued the refugees on world. But something was off with these refugees.

A bad case of Crabs and Thastalis' suicide
The refugees and nearly everyone on world was a genestealer cultist and it was the day of accession. This was not good as no matter how many purges happened or no matter how many medical inspections there were more and more of them. Thastalis asked help from Lord Daroth but he was only berated and sent a squad to purge his ship. That, his realization on how bad his leadership skills were, the massive genestealer infestation, and mounting stress and regret made Thastalis breakdown. He slumped down and cried in the corner of the hangar. He loaded his veins with Obscura via a needle, He wrote a suicide note, and with his plasma pistol he blew his brains out in the hangar. His head didn't exist anymore as his was now a mess on the wall behind him.

Legacy
Thastalis is viewed as a controversial figure post death. During his early days he was an extremely competent and well love leader but as he went deeper and the years stretched on he became more incompetent or even hated. But those who were closet to him loved him. Thastalises helmet and rank has been taken by Viggo Insersson.

Non-canon Shenanigans
On Space Book comms Thastalis was known for being an E-Whore and a parody of an Instagram Model. He posted pictures of his ass and wanted people to pay extreme amounts of money for more pictures of him or buy random joke products like Thastalis Bath Water. Thastalis' patreon and onlyfans still exists but its a wasteland.