A possible plot is that a new, extremely powerful and malevolent monster appears. This monster has a vendetta against humans in general. Frisk, being a human, becomes its first target. The monster uses its unique and deadly powers to quickly overpower Frisk. There could also be a situation where Frisk tries to solve a mystery that is far too dangerous for them. As they dig deeper into the mystery, they unknowingly trigger a series of events that lead to their death. For example, they might awaken an ancient evil that immediately kills them. Another idea is that in a world full of political intrigue, Frisk gets caught up in a power struggle. One of the power - hungry characters sees Frisk as an obstacle and arranges for their death.
One possible plot could be that in a dark, alternate universe, Frisk accidentally wanders into a powerful monster's lair. The monster, feeling threatened by Frisk's presence, attacks without hesitation. Frisk, being human and relatively defenseless, is quickly overpowered and killed. Another plot might involve a betrayal within a group of friends. One of Frisk's so - called friends becomes envious of Frisk's popularity or kindness and devises a plan to get rid of them. They set up a situation where Frisk is in great danger and ultimately meets their demise. A third plot could be related to a curse. Frisk unknowingly breaks an ancient curse that was placed on the land, and as a result, the curse takes their life in a rather cruel and unexpected way.
Well, perhaps in this fanfiction, there could be a plot where a dark curse is placed on Hinata. As the curse takes effect, she gradually weakens until she finally succumbs and is killed. It could also be that a misunderstanding leads to her being in the wrong place at the wrong time and getting killed accidentally.
Often, there's a plot where the sickness is some sort of mysterious ailment that no one really understands at first. So, the characters like Sans or Papyrus might try to use their own unique ways to figure out what's wrong with Frisk. Papyrus could try to 'doctor' Frisk up with his 'amazing' but not always accurate medical knowledge.
Well, it could be that in this fanfiction, Frisk gets bullied because they come from a different background than the others. The bullies target Frisk for being an outsider. As the story progresses, Frisk could meet a mentor - like character who helps them gain confidence and teaches them how to deal with the bullies. Frisk might then use kindness and understanding to turn the situation around and make the bullies realize their mistakes.
A plot could revolve around the power vacuum left by Naruto. The Leaf Village is in disarray, and other villages start to make moves against it. Pain might realize that killing Naruto wasn't really what he wanted in the long run, as it led to more instability. Or maybe a character who was in the background in the original story steps up to try and fill Naruto's shoes. They struggle to gain the respect and power that Naruto had, while also dealing with the grief of his loss.
One possible scenario could be that Natsu is killed in a battle against a powerful and unexpected enemy. Maybe a new dark mage appears with powers that can overpower Natsu's fire magic.
One possible plotline could be that Sonic is facing a new and extremely powerful villain who manages to outwit him in a battle and ultimately kill him. This could lead to his friends, like Tails and Knuckles, vowing revenge and setting out on a journey to become stronger to face the villain.
One possible plotline could be that Tails is killed by a powerful enemy during a battle to protect his friends. Maybe a new, extremely strong villain emerges and Tails sacrifices himself to buy Sonic and the others time to escape. Another could be that there is some sort of accident in Tails' workshop while he is working on a dangerous experiment, leading to his untimely death. It could also be that in a dark alternate universe, Tails is targeted and assassinated by an evil organization that wants to disrupt the balance of power in the world he lives in.
One possible scenario could be that he is killed in a lightsaber duel by a powerful Sith opponent. Maybe this new Sith has some secret technique that Anakin couldn't counter.
In this type of fanfiction, a possible plot could be that the Dursleys' abuse takes a more extreme turn. They might starve Harry to the point of death, as they've always been cruel about his food. Since they've kept him in a cupboard for so long, they could also lock him in there without air or water until he perishes. Also, the Dursleys could spread false rumors about Harry in their neighborhood, which incites the neighbors to turn against Harry. This mob mentality could lead to a situation where Harry is killed. For example, the neighbors might believe that Harry is a dangerous criminal in - training due to the Dursleys' lies and take matters into their own hands.
When Frisk gets killed in a fanfiction, it usually creates a very somber and dark mood. Frisk is often a character associated with hope and new beginnings, so their death is like snuffing out that light. It can make the story feel more tragic and hopeless, as if all the good that Frisk could have brought has been lost.