Sen

Sen is the demon prince of betrayal. They were an adventurer that watched an ally take the throne of lust before their eyes and, when their life was irrevocably changed due to the deaths of their loved one, performed a complicated scheme to usurp a Throne of Sin for themselves.
== Description ==
=== Worshippers ===
==== Sen's Pact ====
== History ==
=== Early Life ===
=== The Gulthias Tree ===
=== Roots of Heaven ===
=== The Hands Invent Him ===
=== Scheme to Usurp Balberith ===
Sen came into an insane amount of wealth due to their stock purchases investing in auto-carriages and union work. Their father passed away in the latter half of 1056 CA after becoming afflicted with the Wasting Stare, a disease caused by the death cults that lingered in the city. Their brother, who was working hard to become highly educated was one of many victims of a large and public battle between House Harrigan and House Rosnald that spilled out into the streets. Sen decided to take on a job from Avaline sponsored by House Harrigan to act as the house's liaison to the Razorclaws Tribe to the west of Nock in hopes of securing allies to help in the brewing civil war manifesting in the city. Before the meeting, Sen meets with Sapphira at the ranch south of the city who advises them that House Harrigan and presumably Avaline are in league with a servant of the demon prince of corruption. Knowing this, they intend to find out for certain if Avaline had any part in the public fighting that led to their brother's demise. For safety, they take an emblem from Sapphira that will allow the angelic hero to teleport to them at any time.
In the ensuing mission, the Bear Lord Nodhr Razorclaws saw through Avaline and House Harrigan's desire for allyship with the Razorclaws and the lands outside as a play for the sole purpose of resource production since the other Houses have broken their trade pacts with Harrigan and with one another. Nodhr took Sen aside and told them that some within the clans had been trying to remove him as their leader and that they had begun praying to the demon prince Balberith to give them the power to defeat and usurp the Bear Lord. After some time investigating the situation in the Bear Lord's town, Sen went to Avaline and explained they must return to Nock to prepare matters for the alliance ahead of Avaline. Nodhr remained in talks with Avaline and the two eventually came to an agreement that they would return to Nock to speak with the lord of House Harrigan to further negotiate, but Nodhr stated he will not be bullied nor would his people and he wouldn't see his town made into another city lord's property again. 
At the meeting, the Lord of House Harrigan known as The Fabricator comes to the meeting as a construct along with his advisor, Malica Wildwarren. It is immediately revealed that this is a trap and the goal was to kill the Bear Lord and use his primal energy to empower Malica's metal dragon, Navra. Nodhr pleads for his life, asking that if he were able to give them Sapphira as tribute instead if they would spare him and his town. Malica considers this a superior position and agrees. Nodhr uses a charm to summon Sapphira to him and she is quickly bested, crying tears of agony as Malica uses The Fabricator's machinery to pull her angelic spark and life force from her. Navra is further empowered and she reveals that her plot all along was to destroy Avaline and learn the secrets of her creation so that she could make an immortal body for herself in her Demon Prince's image. She uses her radiant corrupted dragon to destroy the form of The Fabricator and leave Avaline begging for her life in a state of near death.
It is at this moment Nodhr reveals that they have been Sen the entire time and they use an old gladius they took from the dead cultists that stood against Nodhr to impale the mechanical dragon and siphon all of its powers into Sen. Malica is mortally wounded in the ensuing devastation but secrets away. The death of the dragon rips a hole in the Material Plane directly to the Throne of Lucrino, the Gate (Hell) of Betrayal. Balberith, Demon Prince of Betrayal, the Turncoat King, steps through the rift and demands that his sword known as Backbiter be returned to him. Sen once again reveals their plan was far greater than was originally thought, as Nodhr and the Gray Order Mercenary Company barge through the doors and assail the Demon Prince, having planned for this when Nodhr as Sen arrived in the city ahead of Nodhr/Sen and Avaline, pushing the Prince back into his plane and defeating  him in his throne room. Sen holds the sword, looks to the throne, then to Nodhr and to Belroth, Captain of the Order. They toss a small box used for holding papers to Nodhr and take on their true pale shape before revealing that it was their plan all along to take the seat of Demon Prince as their own. 
Nodhr and Belroth, after being shunted back to the meeting room in House Harrigan inspect the box, revealing that Sen has bequethed all their worldly wealth to Nodhr, thus forcing him into a position of political importance and responsiblity. Belroth was forced to watch again as a friend was betrayed and another took up demonic power. Avaline is taken by Nodhr back to the Bear Lord's town to be helped. Soon after, House Harrigan begins open conflict with the Gray Order which is backed by House Rosnald, and the divisions in the city become battle lines.
== Trivia ==
Sen started as a Player Character created by Elizabeth S "sewingartist" for use in The Gulthias Tree story arc, which was a heavily modified combination of The Sunless Citadel and Curse of Strahd modules made to fit in the Unending Spiral Campaign Setting.