Paul might be characterized as the voice of reason. In a world full of chaos and mythical beings, he can be the one who tries to find logical solutions. He could be a bit of an amateur detective in the fanfiction, using his teaching skills to research and figure out things related to the demigod world. Also, his relationship with Sally gives him a deeper connection to Percy and a motivation to be involved in the demigod's life, so his protective side towards Percy can be emphasized.
Well, Paul might be really shocked at first. Percy could show him some of his demigod powers, like controlling water. Paul, being a normal mortal, would be super amazed and probably a bit scared too.
It could be a new monster that is specifically targeting Percy's mortal connections, like Paul. Maybe a monster that feeds on the fear of mortals who are close to demigods.
One idea could be that Paul discovers Percy's true identity in a really unexpected way, like during a school field trip to a museum where a mythological artifact comes to life. Another could be Paul and Percy teaming up to save Sally from a new threat that has ties to the Greek underworld. Maybe Paul gets dragged into a quest by accident and has to quickly learn about the demigod world.
He could interact with them in a very friendly and awestruck way at first. Like he's constantly asking questions about their powers and adventures, and the Avengers are amused by his enthusiasm. For example, he might be star - struck when he meets Iron Man and keeps asking about his latest suit upgrades.
In this fanfiction, perhaps Paul Blofis, being Sally's husband, could offer Percy some fatherly advice. He might share his own experiences and wisdom with Percy, which could help Percy in dealing with his own complex life as a demigod. Percy, on the other hand, could introduce Paul to the magical aspects of his world, like the existence of Camp Half - Blood and the different gods.
It could be a new monster that is after Percy. Since Percy is a demigod, there are always monsters chasing him. This new monster might be something that Paul has never seen before and it could put both of them in danger.
A great way to develop their relationship is through a shared hobby. For example, if they both like gardening, they can work together in the garden. As they plant and tend to the plants, they talk, laugh, and gradually grow closer. This simple activity can be a starting point for a deeper emotional connection in the fanfiction.
In a fanfiction, Paul could be struggling with understanding the demigod world that Percy and Sally are a part of. Sally takes it upon herself to educate him. As she does so, they start to fall in love all over again, this time with a newfound understanding of each other's lives. Their relationship blossoms as Paul becomes more accepting and involved in the demigod aspects of Sally's life.
Perhaps in this fanfiction, Paul Blofis is a scientist who has been studying the Avengers for years. One day, he discovers a connection between the Avengers' powers and a strange energy source. This discovery attracts the attention of both the Avengers and their enemies. So, the Avengers bring him into their team to help them understand and protect this energy source from falling into the wrong hands. He has to adapt to the superhero life quickly and contribute his scientific knowledge to the team's battles.