Well, Percy himself is of course the main character. Annabeth would also be very likely to be there. Their relationship is a big part of the Percy Jackson series, and in a Tartarus - related fanfiction, she could be either with Percy from the start or trying to find a way to rescue him. Grover might also show up. His loyalty to Percy and his skills as a satyr could be useful in the dangerous environment of Tartarus.
Obviously Percy himself. Annabeth would likely be there as she has a close relationship with Percy. Grover might also show up, being Percy's long - time friend. And some of the other demigods from Camp Half - Blood, like Jason or Piper, could be in the story too.
Annabeth is a very likely ally. Their relationship is so strong that she would follow him into Tartarus and be by his side through thick and thin. Grover could also be an ally. He's Percy's long - time friend and his skills as a satyr could come in handy in Tartarus. Nico di Angelo is another possibility. His knowledge of the Underworld and his powers over the dead could be useful in the dangerous Tartarus environment.
Percy is the main character so he'll be there. Annabeth will probably be by his side as she often is in his adventures. Leo Valdez could also be a character in this fanfiction. His mechanical skills might come in handy if there are any traps or devices related to the Host of Apophis. Piper McLean could be involved too, using her charm - speak to influence certain situations. And Thalia Grace, the daughter of Zeus, could make an appearance. Her leadership skills and her ability to call lightning could be important in the fight against the Host of Apophis.
Percy, for sure. He's the center of the Percy Jackson world. Then there's Tyson, Percy's cyclops half - brother. He could be working in the kitchen of the coffee shop, making giant - sized coffee treats. Clarisse might show up, causing a bit of a ruckus as she demands her coffee strong and fast. And Chiron could make an appearance in human form, sitting at a table and giving Percy some sage advice over a cup of cappuccino. The gods could also make cameo appearances. For example, Dionysus might visit the coffee shop to complain about the quality of the coffee, thinking it should be more like his wine.
Obviously, Percy Jackson himself would be the main character. Khione, as the one who bestows the blessing, would also be there. Annabeth Chase might be in it too. She could be either helping Percy understand his new powers or being a bit skeptical about the whole blessing thing. Grover could also show up, perhaps being a bit scared of Percy's new ice - related abilities at first but then getting used to them.
Percy himself is often very popular. He's the main character in the original series, so in fanfiction about Tartarus, his journey and how he overcomes the challenges there are always interesting. Annabeth is also a popular character. Fans love to write about her either trying to rescue Percy or being part of his adventure in Tartarus. Nico di Angelo is another one. His powers and his somewhat dark and mysterious nature make him a great addition to Tartarus - related fanfictions.
Obviously, Percy would be the main character. He's the one stuck in Tartarus, so the story would revolve around him. Maybe Annabeth could also be an important character, even if she's not physically in Tartarus with him. Her thoughts and attempts to rescue Percy from afar could be part of the story.
Another plot twist might be that Tartarus itself has a weakness that Percy discovers by accident. For example, he might notice that certain sounds or vibrations can disrupt the structure of Tartarus. This would completely change the game as he could then use this knowledge to his advantage, perhaps causing mini - earthquakes to distract or even harm the monsters that are after him.
Obviously, Percy Jackson himself. Then there would probably be Annabeth, his girlfriend. She could be either supporting him in his new role or be a bit skeptical at first. Grover might also show up, providing some comical relief and maybe some sage advice from his nature - centric perspective. Other gods like Aphrodite would surely be there, either causing trouble or trying to manipulate Percy for her own purposes.
Obviously, Percy Jackson himself is a main character. Annabeth might also be very involved, either helping him escape or being there to welcome him back. Grover could be another main character, perhaps using his nature - related powers to assist in some way.