Chara is also quite fascinating. They are a complex character. While they can be seen as a villain in the dark story, their backstory and the way they interact with the player's actions add depth. They seem to be a catalyst for the dark path the player can take.
Sans is very interesting. He is a laid - back character in the normal story, but in the dark story, especially during the genocide route, he becomes a formidable opponent. He has knowledge of the player's actions across different timelines and his fight is full of meta - references.
One interesting undertale dark souls fanfiction could be about a character from Undertale being transported to the Dark Souls universe and having to adapt to its harsh survival mechanics. For example, Sans could end up in Lordran and use his unique abilities to deal with the various undead and bosses. Maybe his shortcuts would work in a different way in the Dark Souls world.
One key element is the concept of a 'genocide route'. In this, the player makes choices that lead to the destruction of the Underground world. The characters, like Sans, have a much darker side during this route. For example, Sans' final battle is a very difficult and tense encounter that shows the despair of the situation.
Some important characters in Undertale story are Toriel. She is like a mother figure to the fallen human at the start. Then there's Sans, a very laid - back but also mysterious skeleton. Papyrus is also important, he's Sans' brother and is full of enthusiasm. Flowey is another key character, who has a rather complex and evolving role throughout the story.
Typically, characters like Frisk, a human who falls into the Underground, can be a main character in an 'Undertale Love Story'. Another could be Sans, the skeleton who is known for his unique personality. Papyrus, Sans' brother, might also be involved in some love stories as he has his own charm. And then there are other monsters like Toriel, who could potentially be part of a love - related plot as well.
In the undertale full story, you've got Frisk as the central human character. Toriel is a major one as she kind of sets the initial mood of the story. Sans is really popular among fans. He's a skeleton who has some deep secrets. Papyrus, his brother, is always full of energy. And Flowey, he's this creepy - cute flower that has a big role in how the story unfolds. There are other characters too, but these are some of the most prominent ones.
Since it's a new story, it's hard to say for sure. But if it follows the original undertale's pattern, Frisk will likely still be a main character. Sans and Papyrus could also be important, as they are very popular characters in the undertale universe.
Some characters might be amused. For example, Sans would probably make some witty remarks about the fanfiction's plot twists. Papyrus, on the other hand, might be a bit confused at first but then get really excited if he finds a heroic role for himself in the fanfiction.
There might be. For example, there could be an old hermit who has been living near the cave and knows some secrets about it. Or a young and curious adventurer who drags their friends into exploring the cave. There could also be some sort of guide character who has a special ability to see in the dark or sense danger in the cave.
Well, it could be hidden plotlines or unexpected character developments. Maybe there are mysterious backstories that haven't been revealed yet.
Well, you could write a fanfiction about a time - traveling adventure in the Undertale world. Maybe the protagonist travels back in time to prevent a certain event that led to the current state of the Underground. Or, a story where the monsters and humans form an alliance earlier than in the original story due to some extraordinary circumstances. Also, a fanfiction that delves into the relationship between different species of monsters in more depth could be really interesting.