A more heart - warming fanfiction could be a story where the characters get a moment of peace. Imagine if there was a hidden corner in the world of Little Nightmares where the characters could relax. Six could share her food with the others, and they could all have a brief moment of camaraderie, forgetting the horrors that surround them for a while.
One idea could be a crossover with Hollow Knight. The protagonist of Little Nightmares could find themselves in the Hallownest, facing the strange and often menacing bugs there. The dark and eerie atmosphere of both worlds would blend well.
Secondly, build interesting relationships between the characters. You could create unexpected alliances or rivalries. For example, the Teacher and the Doctor might form an alliance to keep the children in line, or Six and the Runaway Kid could become rivals for a limited resource. This adds drama and conflict to the story. Additionally, don't be afraid to add your own twists to the existing Little Nightmares lore. Maybe there's a hidden power that one of the characters discovers.
Well, you could write a fanfiction where the stomach growl of the character attracts the attention of a friendly but strange creature. This creature could help the character find food in exchange for something. For example, the character might have to solve a riddle for the creature.
One idea could be a crossover with 'Alice in Wonderland'. The protagonist of Little Nightmares could fall through a distorted mirror and end up in Wonderland. They would encounter the strange creatures there, but with a Little Nightmares' twist of horror and mystery. For example, the Cheshire Cat could be a more menacing figure, with a dark aura and a creepy smile that reveals sharp teeth.
An OC could be a former cook in the Maw who has a change of heart. The fanfiction could explore their journey of redemption as they help the other children. They might have knowledge of the Maw's layout and use it to their advantage.
One idea could be exploring the backstory of the Thin Man. Maybe he was once a normal child in the world of Little Nightmares but something happened to turn him into that terrifying figure.
One idea could be exploring the backstories of Six and Seven. Maybe Six had a family before ending up in the Maw and how that affected her journey. For Seven, we could imagine his adventures before meeting Six. Another idea is a time - travel fanfic where they go back to change certain events in the Little Nightmares world.
One idea could be a story where Six and Seven form an unbreakable alliance to face the terrors of the Maw together. They could discover hidden passages and use their unique skills to outwit the monsters. For example, Six's ability to be stealthy and Seven's strength could be combined.
Perhaps Six has a change of heart and tries to understand the Lady's motives more deeply. She could discover that the Lady was once a victim herself and was forced into her role, leading to a complex relationship development in the fanfiction.
A cool plot could be a character swap. Imagine Frisk from Undertale in the world of Little Nightmares. Frisk's determination would be put to the test in the nightmarish setting of Little Nightmares. They would have to face the Janitor and the Twin Chefs just like Six does. Meanwhile, Six could be in the Underground, dealing with Flowey and Toriel. The contrast in the two worlds' aesthetics and challenges would make for an exciting story.