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.
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 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.
Well, a cool plot might involve Percy Jackson being framed for helping the Host of Apophis. He then has to clear his name while also trying to prevent the actual rise of Apophis. Or perhaps Percy discovers that there's a connection between the Host of Apophis and a long - lost relative of his, and he has to figure out how to break that connection without harming his family. Also, Percy could be sent on a quest by the gods where the final destination is the lair of the Host of Apophis, but the journey there is filled with all sorts of traps and tests.
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.
Draco Malfoy would be a likely character. Given his Slytherin status, he would likely have a complex relationship with Percy. He might start off as hostile, seeing Percy as an outsider, but then they could end up having to work together for some reason.
One character that could betray Percy is Thalia. She has her own issues with the gods and her place in the world. Maybe she gets jealous of Percy's growing popularity and power among the demigods. So, she decides to side with an enemy to take Percy down a notch. Additionally, some minor characters that Percy has helped in the past could be the ones to betray him. They might feel indebted to him but also resentful at the same time. An enemy could manipulate their feelings and turn them into traitors against Percy.
Ares could be a likely character. He's always been somewhat of a wild card in the Percy Jackson series. He might betray Percy for his own amusement or to gain more influence in Olympus. Another could be Zeus. He's often paranoid about his power and might see Percy as a threat and betray him to protect his throne.
Chiron is definitely one of the most likely old teachers to appear. He has been a major figure in Percy's life, guiding him through his early days at Camp Half - Blood. Another could be Mr. D, the god Dionysus in disguise. He was always there, grudgingly watching over the demigods. And of course, there were the various instructors at Camp Half - Blood who taught Percy combat skills, like sword - fighting and archery. They could all make interesting appearances in a meet - old - teachers fanfiction.
Well, Clarisse might be paired with a more aggressive Doom character. She's a fierce warrior in the Percy Jackson series. They could form a powerful duo, fighting side by side against the common enemies. Also, Tyson could be paired with a strong, hulking character from Doom. Tyson is a Cyclops with great strength, and finding a counterpart in Doom that shares that physical power would create an interesting dynamic in the fanfiction.