Atriox's origin story has several key elements. First, his origin within the Covenant as a Brute, a species that was not treated equally. Second, his awareness of the unfair power structure where the Prophets held all the reins. Third, his courage to take action against this established order. Fourth, his ability to attract followers, whether they were fellow Brutes or others who also wanted change. These elements combined to create the story of his rise from a disgruntled member of the Covenant to a powerful leader in his own right.
Well, Atriox's origin story begins with his dissatisfaction as a Brute in the Covenant. He saw the unfair treatment his kind received from the Prophets. This led him to form his own army. He was a natural leader, able to inspire loyalty among other Brutes and even some members of other species. His origin story is really about his fight for equality and power within a very unequal and hierarchical system like the Covenant.
Atriox is a powerful Brute leader. In the Halo Wars 2 Atriox Story, his story is about his rise to power and his conflict with the UNSC. He has a strong will and great combat skills, leading his forces against the humans in a battle for control of the Ark.
There may also be other Brute subordinates of Atriox. They play important roles in following Atriox's orders and contributing to the battles against the UNSC. For example, they might be in charge of different units in the Brute army and help Atriox execute his military strategies.
His friends like Annabeth or Grover could be the ones to rescue him. They might discover a way into Tartarus and brave all the dangers to get to Percy.
It could be another powerful god or goddess who wants to use Percy's betrayal of Tartarus for their own gain. Maybe a god of chaos who sees this as an opportunity to create more disorder in the world. They might manipulate Percy into the betrayal and then turn on him later.
Tartarus is an abyss of nightmares. Picture a place where the very light seems to be devoured. The walls are made of jagged obsidian, so sharp that they seem to cut the air itself. There are strange, twisted formations of rock that look like grotesque monsters frozen in time. The heat is oppressive, not just a physical heat but a heat that seeps into your soul, making you feel like you're slowly being cooked from the inside. And there are echoes, the screams and moans of the damned that reverberate through the endless expanse.
Perhaps he could make an alliance with some of the less hostile creatures in Tartarus. There might be beings who are also tired of the chaos and want to help Percy in exchange for something, like a promise to free them from Tartarus if he ever gets the chance. Percy is known for his charisma and ability to make friends, even in the most unlikely situations.
There's no way to tell who the author is just from the title 'percy is tartarus fanfiction'. It could be written by any fan of the Percy Jackson series who wanted to explore this particular scenario in their own writing. It might be someone new to fanfiction writing or an experienced writer in the Percy Jackson fan community.