What could be the motives of the kidnappers in a Goten kidnapped fanfiction?

One possible motive could be to use Hermione as a bargaining chip against Harry Potter. Since Hermione is his close friend, the kidnappers might think they can force Harry to do something, like give up a powerful magical item or valuable information.

One possible motive could be power. The kidnappers might think that by having Princess Peach, they can control the Mushroom Kingdom. Since she is the ruler, her capture could give the kidnappers leverage to make demands on the kingdom's resources or governance.

One possible motive could be to gain power. Natsu is a Dragon Slayer, and his magic is very powerful. The kidnappers might want to extract his magic or use him as a weapon. Another motive could be for revenge. Maybe Natsu has unknowingly wronged someone in the past, and they are out for vengeance. Or perhaps they are working for a greater evil, and Natsu is seen as a threat to their plans, so they want to get rid of him by kidnapping him.

The kidnappers could be motivated by jealousy. They might see Kuroko's skills and his importance to Seirin and want to take him out of the picture so their own team can have an advantage. For example, a rival team that has been losing to Seirin might think that without Kuroko, Seirin will be easier to defeat.

One possible motive could be money. The Stark family is wealthy, so the kidnappers might be after a large ransom. They could think that by holding Peter captive, they can force Tony Stark to pay up a huge sum.

Another motive could be related to Kirishima's unique quirk. Maybe the kidnappers are interested in studying or stealing his hardening quirk for their own malicious purposes. They could be part of an illegal quirk - trading organization or some sort of mad scientist's group.

One possible motive could be ransom. If Himawari is from a well - off family, the kidnappers might be after a large sum of money. Another motive could be revenge against someone close to Himawari, like her parents. Maybe they have some sort of vendetta and think kidnapping her will be a way to get back at them.

One possible motive could be power. If Naruto has some unique abilities or is a key to something powerful in the fanfic world, the kidnappers might want to control him to gain that power for themselves.

The Grimm could also be involved in an unusual way. Perhaps a new type of Grimm that has the intelligence to kidnap. They might be working with a human or Faunus villain who has some sort of control over them, and they take the character to an unknown location where the RWBY team has to face not only the Grimm but also the mastermind behind it.

The motives could be revenge. Somebody who has been wronged by Deidara or the Akatsuki in general might kidnap him to get even. For example, a village that was destroyed by his explosives could seek vengeance.