A mentor figure could be the one betraying the mc. The mc trusted this mentor completely, but the mentor has some hidden motives. Maybe they are working for a greater evil and see the mc as a threat or a tool to be used, so they betray the mc, which then causes the mc to turn dark.
One possible plot could be that the main character (mc) is betrayed by a close friend or ally. This betrayal shatters their trust and makes them see the world in a different, darker light. They might then start to use more ruthless methods to achieve their goals, perhaps seeking revenge against those who wronged them.
Perhaps in the fanfiction, Annabeth turning into a baby could be part of a magical curse. Her friends would then embark on a quest to find the antidote. Along the way, baby Annabeth could display some of her old characteristics in a cute, baby - like way. For instance, she might still show an interest in architecture by babbling when she sees grand buildings.
One possible plot could be that a magical spell is cast on Simba by an envious rival. This rival, perhaps a forgotten outcast from the pride, sees Simba's position as king and decides to play a cruel trick. Simba suddenly finds himself in a baby's body, with all his adult knowledge but none of his physical strength. His friends and family are confused at first. Nala might be especially protective, like she was when Simba was a cub the first time. Simba has to figure out how to communicate his situation to Rafiki, the wise old mandrill, who then sets off on a journey to find a way to reverse the spell. All the while, Simba is learning new things about his kingdom and the animals in it from this new, baby - like perspective.
If Kaneki turns into a baby in fanfiction, it could be a way to explore his character in a new light. Maybe he retains some of his memories from his previous form, but is unable to communicate them clearly. This could lead to a lot of misunderstandings and new adventures. Also, it could be a chance for the author to develop new relationships for Kaneki, as a baby he would be more vulnerable and dependent on others.
Well, one possible plot could be that some sort of magic spell backfires on Grell. Maybe an experiment by a not - so - skilled wizard was meant to do something else but instead turns Grell into a baby. Then, the other characters would have to take care of baby Grell. They might struggle with things like changing diapers and feeding, all while trying to figure out how to turn Grell back to normal.
Well, the plot could involve his friends or comrades having to take care of him as a baby. Maybe they struggle to figure out how to feed him the right things or keep him entertained. For example, they might try different alien foods to see what baby Keith will eat.
Well, perhaps it could be about a magical spell that makes Amy turn into a baby. Then the story might focus on how her friends or family deal with this sudden change, like having to take care of her in a very different way than before.
In such a fanfiction, there could be a lot of chaos. Maybe Harry and Ron would be completely clueless on how to take care of baby Hermione. They might struggle with simple things like feeding her or changing her diapers. It could also be a really cute scenario where they try their best to protect her in this vulnerable state.
Maybe it could be about a magic spell that accidentally turns Lucy into a baby. Then her friends have to figure out how to reverse the spell while taking care of baby Lucy. They might encounter various challenges and comical situations during this process.