What are some interesting plot ideas for a story about being reincarnated into Undertale fanfiction?

Here are some plot ideas. First, the adult human could be a scientist. They meet Toriel and start to analyze the magic in the Underground. As they collaborate, they grow closer. Second, the human might be a storyteller. They tell Toriel tales of great heroes and adventures from the surface. Toriel is so captivated that she wants to be part of those stories with the human. Third, the human has a troubled past. Toriel, with her motherly nature, helps the human heal. Through this process, their relationship blossoms. In all these ideas, their relationship can develop in a non - sexual, deep and meaningful way, exploring themes of friendship, understanding and hope.

One interesting plot idea could be that Sans uses his mind - reading ability to prevent a major disaster in the Underground. He senses the intentions of a powerful and malevolent force before it can act and is able to rally the other characters to stop it. Another idea is that he reads the mind of a character who is secretly an ally but has been acting strange, and through this he discovers a hidden plan to save the Underground that the character was too afraid to share. Or perhaps he reads the mind of a human who has entered the Underground and discovers their true motives, which are not as bad as everyone initially thought, leading to a different kind of relationship between the human and the monsters.

Well, a cool plot for 'Undertale meets Underswap fanfiction' might involve a character exchange program of sorts. Papyrus from Undertale goes to Underswap and tries to teach his Underswap counterpart how to be more confident in his cooking skills. At the same time, the Underswap Sans could come to the normal Undertale world and introduce new ways of having fun to the rather serious Sans there. This could lead to a series of comical and heartwarming interactions between the characters from both universes.

A plot could involve a love story between a character from Undertale and one from Underfell. Their different worlds' values and cultures clash, but they still manage to find common ground and fall in love. This could lead to them trying to bridge the gap between the two universes to be together.

One idea could be that the Turtles end up in the Underground world of Undertale. They might have to navigate through the various regions, like Snowdin or Hotland, using their ninja skills. For example, they could use their stealth to avoid some of the more dangerous monsters. Another plot could involve the characters from Undertale being brought to the Turtles' New York. They would then have to deal with the Foot Clan and other threats in this new, strange environment.

One interesting plot idea could be that characters from Undertale end up in the Overtale universe and have to adapt to its different rules and power systems. For example, Sans might find it strange that magic works in a more complex way in Overtale. Another could be a character from Overtale getting lost in the Undertale world and having to deal with the moral choices that the Undertale characters face, like whether to kill or spare enemies.

A possible plot could involve the souls in Undertale having some connection to the spirits that are rumored to be in the FNAF animatronics. The main character from Undertale, perhaps Frisk, could enter the FNAF world and try to free the trapped souls. In return, the animatronics could help Frisk in the Undertale world against some powerful foes.

Well, it could be that there is a glitch in the multiverse that causes a fusion of the two worlds. So we have characters like Frisk interacting with Freddy Fazbear. Frisk might try to show the animatronics a different way of living, more like the pacifist way in Undertale. And in the process, they all have to deal with the threats that exist in both worlds, like the purple guy from FNAF and the more malevolent monsters from Undertale.

Well, another plot could involve Sans and Papyrus coming to the RWBY world. Papyrus might be fascinated by the Grimm and try to befriend them, while Sans could use his powers to help the RWBY team in their battles against Salem. He could also share his knowledge of timelines with Ozpin.

One idea could be that the reincarnated character has memories of the future of the Boruto world. So they try to prevent certain disasters from happening, like the fall of Konoha. Another could be that they use their modern - day knowledge to revolutionize the ninja technology in the Boruto universe.