Rahksis: King of Devils
He is not the real king of the House of Devils, but he claimed the title after the old King was slain.
Rahksis has been around since the Battle of Twilight Gap. In which he provided support alongside the other Devils. However his mind changed after a while. Seeking an interest in Guardians and their light.
After the battle Rahksis was known as Rahksis the Broken. Because of his broken ties to his home and his broken mind. Thinking he could somehow, someway become a Guardian by absorbing their light. However things did not go well.
For years Rahksis would hunt down the weakest Guardians and filter their light. Trying to make it so it was strong enough to support his body. However the Wolves atracked his home, leading him to return to a broken house, a destroyed throne, and a slaughtered king. This led to Rahksis rising up above his fellow Captains asserting the rank of Archon. Yet his attire is much like a Captain, he was still an Archon.
So he gathered as many Devils as he could and went to attack the Wolves and their Kell Skolas. However the Guardians beat him to the punch. Capturing Skolas and murdering him easily. This led to a fall out of all the houses. Each one scattering to find a new Kell. One to rule them all, even to this day. But not Rahksis. He continued his work trying to the best of his ability to get it to work. Capturing his own ghost Barbos from a Warlock.
But even after all that he continues to fail. Experiment after experiment. Even after joining the House of Dusk. But he continued without rest. It became an obsession. He didn't want to be a Guardian for the power, or the feeling of the Light. It was because he wanted to be more than an Eliksni. More than a random Captain Archon. He wanted to show the his kind that they could be more. Just like when their kind had the Great Machine.
So he left Dusk killing all those in his way to reform the Devils under his rule. No Fallen, Cabal, Vex, Hive, or Guardian were going to get in his way. Except maybe a young female Guardian he has an eye on. That has a thing for...swords.