Well, the relationship could start with Papyrus's passion for spaghetti. He could talk to the spaghetti as if it were a friend, sharing his day and dreams. Maybe he gives the spaghetti names based on how it looks, like 'Curly' or 'Longy'.
One characteristic is the strong focus on their brotherly relationship. Fanfics often show how Sans and Papyrus rely on each other, like in how Sans might be the more laid - back one while Papyrus is full of energy and enthusiasm, and they balance each other out. Another is the use of the unique Underground setting. It provides a backdrop for their adventures and interactions. For example, they might be dealing with other monsters while also strengthening their own bond.
Underswap Papyrus is an interesting character. In fanfiction with a reader, it often explores a unique relationship. The fanfictions might show his charming, kind and sometimes goofy side. It could be about an adventure where he and the reader go through challenges together, or just a slice - of - life story where they get to know each other better.
A 'baby papyrus fanfic' could be a fan - made fictional story centered around the character Papyrus in a baby - like form. It might involve cute and innocent scenarios, perhaps his interactions with other characters in this unique state.
One popular papyrus crossover fanfiction might be the ones that cross it with other well - known game universes. For example, a crossover with the Zelda series could have interesting storylines. Papyrus in the world of Hyrule might be on a quest to find a special type of 'pasta' that is said to give him ultimate power in the land. Another could be a crossover with the Final Fantasy universe where he teams up with the characters there to battle some new evil force.
A popular sans x papyrus fanfic is 'Shared Skies'. It has a really interesting plot where they face a new threat together in the Underground and their bond grows stronger as a result. 'Soulful Bonds' is also a good read. It dives deep into their emotional connection and how their personalities complement each other. 'Brotherly Love' is a simple yet effective fanfic that just showcases the pure love and care they have for one another.
One popular trope is the 'fish out of water' scenario. The reader, often being from a different world or just not used to the Underswap universe, has to adapt, and Papyrus helps them. Another is the 'unlikely friendship/romance' trope, as Papyrus' exuberant personality might seem at odds with the reader at first.
One common theme is the exploration of an unlikely relationship. Since Papyrus is a very positive and friendly character and Chara has a more complex and somewhat controversial backstory in the Undertale universe, seeing how they interact and form a relationship is often explored. For example, some fanfictions might focus on Papyrus helping Chara to overcome their past traumas.
Papyrus was quite tired after a long day of waiting for humans to come through his puzzles. When it was bedtime, he climbed into his big, comfy bed. He thought about his brother Sans and how they had fun together. He also thought about his aspiration to be popular. He decided that he would work even harder on his puzzles and his cooking. As he lay there, he began to sing a little song to himself, a song about friendship and courage. His voice grew softer as he got sleepier, and eventually, he fell into a deep slumber.