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.
The Doom Slayer and Commander Shepard are likely to be paired. They are both iconic heroes in their respective universes. Shepard is a strategic leader, while the Doom Slayer is a force of pure destruction. Their interactions could lead to some really interesting storylines.
Some fanfiction also pairs Grover with the hobbits. Grover's gentle nature and his connection to nature could be really interesting when paired with the hobbits' love for their Shire. He could introduce them to new aspects of nature that they've never seen before.
I think Hinata and Rias could be paired up in some way. Hinata's gentle nature and her strong loyalty could complement Rias' leadership and determination. They might form an unexpected friendship or even a strategic alliance within the fanfiction's plot.
Percy and Katniss are often paired. It makes sense because they are both strong - willed leaders. Percy has his powers and his sense of humor, while Katniss has her survival skills and determination. Their different backgrounds would make for an interesting relationship in a fanfiction story.
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.
Sasuke and Tex might be likely to be paired up. Both are strong and somewhat brooding characters. Sasuke's quest for power could be paralleled with Tex's own abilities and her role in the Red vs Blue universe. They might engage in some intense battles or even end up having to work together against a common enemy, leading to some interesting character development for both of them.
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.