Well, it might be that the kidnapper has some sort of medical need that they think Kaoru can fulfill. Since she's a nurse, they could be desperate for medical attention that they can't get through legal means. Or perhaps there's a villain in the fanfiction who just wants to create chaos in the hospital by taking one of its nurses, and Kaoru happened to be the unlucky one.
It could be a jealous coworker. Maybe they feel that Kaoru is getting all the attention or a promotion they wanted. Another possibility is a patient who has become obsessed with Kaoru during their treatment. Or perhaps it's someone from Kaoru's past who has a grudge against her.
There could potentially be such a fanfiction, but it's not a very common or well - known trope in general fanfiction. It really depends on the fandom or the creative minds of individual fanfiction writers. Maybe it exists in a very niche or specialized area of fan - created works. You might also consider reaching out to fanfiction communities or forums to ask if anyone has heard of or read such a story.
Well, she might be held for ransom. Maybe the kidnappers think that as a nurse, she has access to valuable medical information or drugs that they can sell on the black market.
One plot idea could be that the kidnapper has a personal vendetta against Kaoru. Maybe Kaoru witnessed something she shouldn't have, and the kidnapper wants to keep her quiet. Another idea is that it's a case of mistaken identity, and the real target was someone else in the same hospital. A third idea could be that a deranged fan of Kaoru's kidnaps her in an attempt to make her their own, thinking they can 'protect' her from the outside world.
Perhaps in this fanfiction, Kaoru is kidnapped because of her special skills as a nurse. There could be an underground group that needs her medical expertise for some illegal or secretive operation. So, they abduct her to force her to work for them.
Another motive could be related to her family. Maybe there was some sort of blood feud or an old grudge against the Grangers. The kidnappers could have thought that by taking Hermione, they could get revenge on her family. In some fanfictions, there are secret magical families that have long - standing rivalries, and Hermione's kidnapping could be part of that.
Another reason might be revenge. There could be a character who has a grudge against Inuyasha or someone close to him. So, they kidnap him to make him suffer or to use him as bait to draw out his friends. For example, if there was a demon whose family was slain by Inuyasha in the past, they might kidnap him for revenge.
Kaoru could try to gain the trust of one of the kidnappers and then use that opportunity to escape. For example, if there's a less hardened kidnapper among them, she could pretend to befriend them and then make a run for it when they let their guard down.
One possible motive could be ransom. Maybe someone wants a large sum of money from Philip's family or friends. Another could be revenge. Perhaps Philip has unknowingly wronged someone in the fanfiction world, and this is their way of getting back at him.
It could be a former patient of Kaoru's who has some mental issues. He might have misinterpreted Kaoru's care as something more and when she didn't reciprocate in the way he wanted, he decided to kidnap her.