Often, there's a theme of growth and change. Sans, who is known for his somewhat static and carefree nature, may have to grow and adapt in these fanfictions. The pregnancy could be a catalyst for him to become more responsible, or it could lead to self - discovery as he contemplates his new role as a father - to - be. This can add depth to his character that may not be as explored in the original source material.
One common theme could be the challenges of impending parenthood. Sans, being a unique character, might face these challenges in his own special way, like trying to balance his usual lazy attitude with the responsibilities of having a child on the way.
Another theme could be the relationship dynamics. It might explore how Sans' relationship with his partner (if there is one in the fanfiction) changes during the pregnancy. There could be moments of increased closeness, as well as potential conflicts due to the stress of the situation. Also, the fanfiction might touch on how the other characters in the Sans - related universe react to the news of his impending fatherhood.
In 'Undertale Pregnant Sans' fanfiction, a frequently seen theme is the relationship dynamics. How Sans' relationships, whether it's with his friends or family (if applicable in the fanfiction's interpretation), are affected. There might also be themes related to the challenges he faces during the pregnancy, like dealing with potential threats in the Underground while being in a vulnerable state. Also, some fanfictions might explore the idea of Sans preparing for the new life that's coming, which could involve everything from gathering resources to making emotional preparations.
One common theme could be the challenges of unexpected pregnancy. Since it involves a unique pairing like'reader x sans', there might also be themes of how different species or beings handle pregnancy. Another theme could be the relationship development between the reader and sans during this life - changing event.
In 'aftertale sans x reader pregnant fanfiction', a frequent theme is the relationship dynamics shift. With the pregnancy, there are new emotions and responsibilities. There might be themes of sacrifice too, as Sans and the reader may have to sacrifice some of their own wants for the sake of the baby. Also, the theme of community support can be present, as other characters in the aftertale universe may come to help or offer advice during the pregnancy.
One common theme could be the exploration of family and relationships. Since the concept involves a pregnant character, it might focus on how Ink Sans and other characters deal with the upcoming addition to their 'family' within the fanfic's universe.
Often, themes of friendship or rivalry might be present. They might start off as rivals but then develop an understanding or even a friendship. Another theme could be the contrast between their personalities. Lust Sans is known for his more flirty nature while Fell Sans has a more aggressive side, and how these play out in their relationship is a popular theme. Also, in some fanfictions, they might team up to face a common enemy or situation, which is also a recurring idea.
Another theme is friendship or partnership. They often come together to face challenges in the Underground. For example, in many fanfictions, they join forces to defeat a powerful monster or solve a mystery that threatens their world. This theme of unity despite their differences is really appealing.
One common theme is friendship. Since they are from different 'worlds' in the Undertale AU, their journey to become friends is often explored. Another theme is redemption. Sometimes Cross Sans might have a troubled past and Dream Sans helps him find a new path.
Power dynamics is also a frequent theme. Nightmare Sans is often depicted as very powerful, and Cross Sans has his own set of powers. Fanfictions might explore how they use or abuse their powers in relation to each other. It could be a power struggle, or they could end up combining their powers for some greater purpose.
One common theme is power. Both characters are quite powerful in their own right, and fanfictions often explore how their powers interact. Another is the idea of redemption or the lack thereof. Since they are not exactly 'good' characters, some stories might play with the concept of them finding a way to be better. And of course, there's the theme of their relationship, be it a partnership, a rivalry, or something in between.
Friendship is a common theme. Despite their different natures, they often form a bond in these fictions. For example, they learn to understand and accept each other.