In this fanfic, Percy could interact with the orderlies. Some of them might be cruel and mistreat him, while others could be sympathetic. He could also meet other patients who are not as well - known as the main villains. These patients could have their own unique stories and personalities, and Percy's interactions with them could range from friendly to hostile. For example, there could be a patient who is a schizophrenic artist and Percy could either be inspired by or frightened of his art. And of course, he could interact with the asylum's director, who might be hiding some dark secrets of the asylum and try to keep Percy from uncovering them.
He could interact with the Joker. The Joker might play mind games with Percy, trying to drive him to the brink of madness. Also, Harley Quinn could be there, perhaps befriending Percy in a strange way or using him for her own devious plans.
The plot could involve Percy arriving at Arkham Asylum, perhaps as a new patient or a visitor. He might encounter various iconic villains from the Arkham universe and have to navigate the dangerous and chaotic environment. Maybe he has a special ability or knowledge that makes him stand out among the inmates and staff.
The Joker could be the main villain. He might see Harry as a new plaything and constantly torment him with his cruel pranks and mind games, making Harry's stay in Arkham a living nightmare.
There could be new characters as well, like a devil mentor figure who teaches Percy about his devil heritage. This character could be ancient and have a lot of knowledge about the devil realm. Or there could be an angelic character who is initially an enemy but later realizes Percy is not fully evil and they end up forming an unlikely alliance.
He could meet the Joker. The Joker is a well - known character in Arkham Asylum, and his chaotic nature would surely create an interesting interaction with Harry.
One possible plot could be Harry exploring the dark secrets of Arkham Asylum. He might encounter various infamous inmates and try to survive their threats while also uncovering a conspiracy within the asylum's walls.
He could interact with his old friends at Goode, like Rachel. She has a special connection to the demigod world, and their relationship could be further explored. Also, there might be new teachers or students that Percy meets. Maybe a new student who is actually a demigod in hiding too, and they start to figure out each other's secrets.
Percy could be a young boy who has just moved to a new neighborhood. He's shy and misses his old friends. So, when he meets a friendly neighbor, he wants to cuddle as a way of showing his need for friendship and comfort.
In a fanfic, Percy could have a mental battle with Gaea where the lemon plays a key role. Imagine Percy enters Gaea's mind - realm. There, he finds a withered lemon tree. By using his willpower and connection to the ocean (as water is also related to life like the lemon), he tries to revive the tree. As he does this, Gaea is forced to watch and is affected by his actions. If he succeeds in making the tree bloom again, it could signify his victory over Gaea's destructive plans.
In this fanfic, Harry could be sent to Arkham Asylum for some mysterious reason. Once there, he might discover secrets about the asylum that the authorities are trying to hide. He could start to question his own sanity as he witnesses the extreme cases of mental illness around him. And perhaps, through his experiences, he might find a way to bring some sort of change or hope to that desolate place.
In addition to the main ones, there could be other inmates like Scarecrow. His fear - inducing tactics can create some really intense scenes when interacting with Batgirl. Poison Ivy might also be present, especially if the story involves some sort of ecological or plant - related mystery within Arkham. And then there are the guards of Arkham Asylum, who can be either helpful or obstructive to Batgirl's goals.