Papyrus might be initially shocked. He's used to Sans being more laid - back, so seeing him in a fight could be quite a surprise. His eyes would widen and he might gasp.
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'.
A papyrus bedtime story could be about a little girl in an ancient Egyptian village. She found a papyrus with strange markings. As she was about to go to bed, she started to decipher the markings. The papyrus revealed a story of a great hero who fought a monstrous serpent. The hero used a magical amulet to defeat the serpent. The girl was so engrossed in the story that she felt like she was there with the hero. She imagined the hero's bravery and how the village celebrated his victory. When she finished the story, she fell asleep with a smile on her face, dreaming of ancient Egyptian heroes.
In yandere x reader fanfics, yanderes usually display intense emotions. Their love for the reader is not the normal kind; it's more of an obsessive love. They may have a dual personality where they can be extremely sweet and loving one moment, but if they feel threatened in their relationship with the reader, they can turn very dangerous and menacing.
Yandere characters in these novels are often extremely possessive. They see the object of their affection as solely belonging to them. For example, they might get angry or even violent if someone else shows interest in their beloved.
One of the well - known yandere characters is Yuno Gasai from 'Future Diary'. She is extremely possessive of her love interest, Yukiteru Amano. Yuno is willing to do anything, including murdering others, to ensure that she is the only one in Yukiteru's life.
Magical creatures can also be main characters in a papyrus bedtime story. For example, a sphinx with the body of a lion and the head of a human or a phoenix that rises from the ashes. These creatures can bring mystery and excitement to the story, making it a great bedtime tale.
One great idea for a fanfiction could be a story where Underswap Sans and Underswap Papyrus go on an adventure in the Underground. Maybe they encounter a strange new monster that no one has ever seen before. They have to use their unique abilities to figure out how to deal with this new threat.