The mad scientist could be obsessed with creating a new type of monster using a combination of Greek mythology and modern science. He kidnaps demigods to get the necessary genetic material. Percy and his friends have to track down the scientist's hidden lair, which is protected by all sorts of high - tech security systems and mutant creatures. Along the way, they discover that the scientist has a tragic past that led him to this mad pursuit, but they still have to stop him before he creates a monster that could end the world as they know it.
One idea could be that the mad scientist discovers Percy's demigod powers and tries to replicate them in a lab - creating some sort of artificial half - blood. Another could be that the mad scientist is working for a Titan and is using his inventions to try and defeat Percy and his friends. Or perhaps the mad scientist has created a time - traveling device and accidentally sends Percy to a time when the gods were first born, causing all sorts of chaos.
A plot could involve the mad scientist kidnapping one of Percy's friends to use as bait. The scientist wants to study Percy's connection to the ocean and how he can control water. So, he lures Percy into his elaborate underwater lair filled with strange contraptions. Percy has to use his wits and powers to not only rescue his friend but also stop the mad scientist from unleashing a powerful, water - based weapon that could destroy the underwater world. This would involve Percy facing new and strange challenges created by the scientist's inventions.
A possible plot is Percy being sent on a mission by the gods to study a strange phenomenon in the ocean that is affecting both the mortal and demigod worlds. He uses his scientific skills, which he has developed over time, to analyze the situation. He might encounter sea monsters that are acting oddly due to this phenomenon and has to figure out how to stop it. Or perhaps Percy is recruited by a secret scientific organization within the demigod world that is trying to find a way to bridge the gap between the magic of the gods and modern - day mortal science. He could bring a unique perspective with his experiences as a demigod.
A possible plot for 'rwby mad scientist fanfiction' could involve a scientist who believes that the only way to truly defeat the Grimm is to become like them. So, he starts experimenting on himself, gradually turning into a half - Grimm, half - human being. This transformation gives him new powers but also makes him lose his sanity bit by bit. Meanwhile, the RWBY team has to figure out whether to stop him or use his newfound knowledge and power against the Grimm. Another plot could be a mad scientist who discovers a way to control the minds of the people in Vale. He uses this power to create chaos and start a war between the Huntsmen and the civilians. The RWBY girls then have to find the source of this mind control and stop the scientist before it's too late.
The mad scientist could start as a seemingly normal person, perhaps a researcher who gets too curious about the demigod world. As he delves deeper, his obsession grows. He could be shown making small, unethical experiments at first, like testing demigod blood on normal animals. Then, as he gets more confident, he starts to target demigods directly. His character could also have a backstory of being shunned by the scientific community for his radical ideas, which fuels his determination to prove himself through his mad experiments.
One idea could be a quest where Percy and Artemis have to team up to rescue a group of demigods captured by a powerful new enemy. Maybe a Titan who has found a way to drain the powers of young demigods. Percy's skills in water manipulation and combat, combined with Artemis's archery and her connection to the moon, would make for an exciting adventure as they face various challenges along the way.
Well, a plot could involve Percy Jackson stumbling upon a hidden cave where cavemen are in a sort of stasis. When they wake up, they mistake Percy for a god because of his powers. Percy then has to teach them about the modern world while also learning about their primitive yet magical ways of life. Maybe there are ancient artifacts in the cave that are related to the Greek gods and Percy has to protect them from being misused.
One plot idea could be that Percy has to face Arachne in a battle of wits rather than just a physical fight. Maybe Arachne weaves illusions within her webs that Percy has to break through to reach her. Another could be a scenario where Arachne tries to use Percy to get revenge on the gods by tricking him into stealing an important artifact from Olympus. A third idea is that Percy and Arachne form an unlikely alliance when a greater threat emerges that endangers both of their existences.
A plot could involve Percy accidentally stumbling into Artemis' territory. At first, Artemis is angry but then realizes Percy has information about a threat to her hunters. So they start an adventure to stop this threat. During the journey, they learn more about each other's worlds and develop a mutual respect. Or maybe there's a spell that makes Artemis lose her powers temporarily and Percy has to protect her while she regains them.
A really interesting plot could be that Cupid, for some reason, decides to make Percy the ultimate symbol of love in the demigod world. Percy is then thrust into a role he doesn't understand, having to deal with love - sick demigods coming to him for advice. Meanwhile, he has his own relationship problems, like his feelings for Annabeth being complicated by this new status. He has to figure out how to handle Cupid's meddling and restore some normalcy to the love lives of those around him.
One idea could be Percy having to adapt his demigod skills to his new situation in a wheelchair. For example, he might have to figure out new ways to fight monsters. Maybe he uses his wheelchair as a weapon somehow, like ramming into foes or using it to block attacks. Another plot could involve his friends helping him adjust, and together they discover new powers or artifacts that are specifically useful to him in his wheelchair - bound state.
One plot idea could be Percy having to team up with Hera to rescue a group of demigods who have been captured by an ancient monster. Hera, despite her usual aloofness, realizes she needs Percy's unique skills.