Darth Revan

Revan was a former Jedi, and current Lord of the Sith from the Old Republic era. He, along with his Sith Empire, were taken to the Hubspace, although remained in his own universe throughout the merge.

Arrival In The Multiverse
Darth Revan arrived in the Multiverse some time after the merge. He arrived with his fleet, and the Star Forge. Revan and his Sith Empire remain in the Unknown Territories of his own galaxy for some time, before beginning his eventual conquest. He began in the Outer Rim, set on the conquering of his own galaxy, prior to his expansion into the expansive Multiverse.

Sorgan Occupation
Beginning with the small krill farming backwater of Sorgan, the Sith Lord intended this planet to be used by his Empire as a small fortification, with several outposts, and with a small output of Krill utilized as a manufacturing plant of the Crustaceans. His sacking of Sorgan was quick and decisive, with the planet was carpet bombed by the Empire.

Meeting The Mandalorian
On the journey down to Sorgan, Revan and a group of Sith Troopers encountered a Gunship in the forests outside of a quaint, untouched village. He ordered the gunship opened, and encountered a Mandalorian awaiting him. Revan tricked the Mandalorian into coming with him, Djarin believing him to be a fellow Mandalorian. On the contrary, Revan eventually revealed his true intentions, and threatened Din into his service as a Warlord for his Sith Empire.

Conquest Of The Outer Rim
Following the sacking of Sorgan, Revan continued conquering planets in the Outer Rim, focusing on the edges of the galaxy.

Building His Army
Revan brought Din Djarin back to the Star Forge in the Unknown Regions, introducing the ship manufacturing plant. He took the Mandalorian to the Bridge, and left the Mandalorian under the supervision of his Officers while Revan set out in search of potential alliances.

Gaining Allies
With information from Din Djarin, Revan learned of the Galactic Empire led by Darth Sidious and Darth Vader. Because of this, Revan set out in search of allies in the upcoming war between the two Empires. His search brought him to Hoth, where he met Carracta Nagea, a powerful force user. He and Carracta struck a deal. From this deal, he garnered an entire new Empire thanks to Nagea.

Din Djarin's Escape
By the time of Revan's return to the Star Forge, he and Din Djarin made their way to Dantooine. Din Djarin made his daring escape from the clutches of the Sith Empire before Revan bombards the old Jedi Temple. Din Djarin contacts Luke Skywalker and Cal Kestis, who were on Dantooine's surface.

Duel at Dantooine
The war, following Din's escape, had begun. In a moment of rage, Revan bombed the Jedi Temple, and the Galactic Empire arrived moments later. Revan travels to the surface of the planet, and meets Darth Vader below. A short duel ensues, wherein both Sith Lords disappear with no trace.

Death and Influence
Somehow, Revan returned to the Star Forge after surviving his duel with Vader. As he rest, another Revan arrived. A Sith Lord far more powerful than himself, the Dark Lord was overwhelmed and struck down after a battle between the Sith Lord and Emperor.

The Emperor took the Dark Lord's place in the Empire, leaving the deceased Sith Lord defunct after his death.

Personality
Revan is a fierce, loyal servant to the Republic. His loyalty to the Republic was so strong, he left the Jedi Order to participate in the Mandalorian Wars. Revan was renowned as a tactical genius, and proven in the Mandalorian Wars. His charisma and determination turned several Jedi to his cause during the Wars, such as his future Sith Apprentice, Malak, and the Jedi Exile Meetra Surik. Over the course of the Mandalorian Wars, Revan became much more cold and calculating, though retained his moral compass, as shown in his distaste for the tactics used during the Battle of Malachor.

Din Djarin
His initial captive, Revan used Din's past as a Mandalorian to his attempted advantage, believing the man to hold key knowledge in the tactics of the modern-day Mandalorians. Despite this, he kept the Mandalorian as a Warlord in his Sith Empire for some time, before their trip to Dantooine, wherein Din escaped while Revan was busy in a duel with the Sith Lord Darth Vader. Revan has claimed it was his intent for Din to escape, for news of the Star Forge to spread, mainly to strike fear into the hearts of his enemies.

Carracta Nagea
While Revan didn't know Carracta for long, she'd become a valuable asset to the Sith Lord's forces. Essentially his right-hand, Nagea holds a considerable force of control in his Empire, acting as a Warlord in Revan's Sith Empire.

Darth Vader
Automatically considered an enemy by Revan. he's heard tell of Vader from his apprentice Starkiller, and later met the Sith on Dantooine. The two fought there as Luke Skywalker, Cal Kestis and Din Djarin escaped, and the result of the battle is unknown.

Powers

 * Force Lightning: Revan is extremely proficient in force lightning, even being able to turn Darth Nyriss into dust after years of captivity and torture by the first Sith Emperor.
 * Comprehend Language: Revan holds an ability few force wielders have; comprehend language. It's been said Revan learning a language from a native speaker is like 'ripping the words from your mind', by the Rakata of Lehon. This contrasts Luke Skywalker, and other's same ability.
 * Telekinesis: Revan, like many Jedi Masters and Sith Lords, was a master of utilizing the force to manipulate his environment. Be it moving a crate, or throwing someone against the wall, he is extremely skilled.
 * Force Echo/Psychometry: After gaining amnesia at the hands of the Jedi Council (in canon), touching his mask from the Mandalorian Wars gave him all his previous memories back with a simple touch.
 * Force Sense: By 3954 BBY, Revan believed he could sense the Jedi General Meetra Surik across the galaxy just from her presence. Despite this, her severing of the force prevented this.
 * Farsight/Force Visions: By touching the Star Forge maps after his amnesia, Revan would be greeted by flashes of moments in his life, visions brought on by the force.
 * Force Heal: It has been said that Revan is able to heal himself mid-battle, from using his own force energy, or even utilizing other's for his own gain.
 * Force Slow: Revan is able to trigger stasis in others with the force, freezing their bodies and minds in place.

Abilities

 * Multilingualism: Revan can speak several languages, including: native Basic, Mando'a, Binary, Huttese, Shyriiwook, the language of the Selkath and the ancient Sith. He also holds an understanding of the Rakatans, allowing him to understand what they may be saying.
 * Skilled Strategist and Tactician: Revan single-handedly turned the tide of the Mandalorian Wars alongside his Revanchists, turning a losing battle for the Republic into a large victory.
 * Skilled Mechanic: Revan constructed the assassin droid 'HK-47' sometime during his time before the Multiverse's merging, although it didn't accompany him to his travel into the Multiverse.
 * Skilled Pilot: Revan is able to pilot fighter ships, swoop bikes, and even larger ships, including his own; the Ebon Hawk.

Equipment

 * Mandalorian Mask: Gaining this Mandalorian Mask sometime during the Mandalorian Mask, Revan vowed never to take the mask off until the Mandalorians were wiped from the Republic. Even following his victory, he continued to wear the mask as a symbol for his new Sith Empire.
 * Revan's Sith Lightsaber: A red saber, a trademark for Sith Lords, used by Revan. He gained this saber sometime after his turn post-Mandalorian Wars.
 * Revan's Second Ligthsaber: The lightsaber from his Jedi days, his second saber is a purple one, symbolizing his usage of the light and dark sides of the force even as a Jedi.