A comical plot could be that Nico and Jyugo accidentally switch bodies. This leads to all sorts of hilarious situations as they try to act like each other. Jyugo has to deal with Nico's love for sweets and Nico has to handle Jyugo's more serious and often dangerous situations. Their friends are completely confused at first but then start to figure out what's going on and try to help them switch back.
One idea could be a story where Nico and Jyugo team up to solve a mystery within the prison. They use Nico's knowledge of the prison's secrets and Jyugo's unique abilities to figure out who is behind a series of strange events. Maybe it's a plot to break out some dangerous inmates, and they have to stop it.
Maybe they discover they have a long - lost relative who is in danger. So they team up, Percy using his water powers and Nico his underworld powers to fight the dark forces that are after their relative. During this, they grow closer as brothers and understand each other better.
Maybe they are all transported to an alternate dimension where the rules of their world are different. Percy has to figure out how to use his powers without water, Thalia discovers new aspects of her lightning, and Nico has to deal with different types of underworld creatures. They must find a way to get back home while also helping the people in this new dimension.
There could be a story where Percy is submissive in a battle - training scenario. Nico, who has unique battle strategies, is in charge of training Percy. Percy has to follow Nico's every order, which at first he resents but then realizes the value. In a different plot, they could be in a time - travel adventure, and Percy is submissive as Nico is the only one who can navigate the time - streams. They go back to important events in their pasts and Percy has to do as Nico says to not disrupt the timeline. Also, a plot where they are in a sort of magical contract situation, and Percy is submissive to Nico until certain conditions are met, during which time they face internal and external struggles and grow closer as a result.
Maybe they could have a story where they discover a secret about their family's past together. They'd have to deal with the revelations and how it affects their relationship. For example, they might find out that there was a powerful ancestor and they have to figure out how to use or protect the knowledge of this ancestor. This would involve a lot of character growth for both of them as they learn more about themselves through their family history.
Well, they could be in a situation where Chaos has plans for them that conflict with their own loyalties. Percy might be hesitant because he has friends and a life back at Camp Half - Blood, Thalia has her Hunters, and Nico has his own reasons to be cautious. But Chaos shows them visions of a future where if they don't cooperate, everything they know will be destroyed. So they embark on a journey together. Along the way, they face challenges like traversing through shifting landscapes in the Chaos realm. They also have to deal with their own internal conflicts as their personalities clash at times while trying to work towards the goal set by Chaos.
Perhaps they go on a quest to find their long - lost family heritage. Along the way, they face various challenges that test their brotherly bond. They might have to cross a dangerous river that only Percy can navigate, but Jason has to use his wind powers to keep them from being swept away, while Nico uses his underworld powers to fend off the ghosts that lurk in the water.
One interesting plot idea could be that they go on a special adventure to find a lost ancient island that only Robin can decipher the clues to reach. And along the way, Luffy's unwavering determination and Robin's knowledge work together to overcome various obstacles like strange sea creatures and difficult terrains.
One idea could be a school competition where Percy and Nico have to team up against other demigods. They could use their unique powers in unexpected ways to win, like Percy using his water control to create cool water sculptures as part of an art contest, and Nico summoning shadowy creatures for a drama performance.
Another plot could be set in a modern - day high school where they are trying to keep their demigod identities a secret while also dealing with typical high school problems like bullies and exams. Their different personalities - Percy's laid - back heroism, Thalia's tough - girl exterior, and Nico's brooding nature - create interesting dynamics as they navigate both the mortal and demigod worlds together.
Often, their friendship is shown as a contrast. Nico is the more light - hearted and fun - loving one, while Jyugo is more brooding. Nico brings out the more positive side in Jyugo, like making him laugh or getting him involved in silly prison games. For example, Nico might convince Jyugo to join in a card game with the other inmates.