There could be other characters who are trying to stop Chara from eating the human. Maybe a group of friends or family of the human, or some sort of protectors in the world of the fanfic. They would play a crucial role in trying to prevent the dark act from happening.
One potential father could be Asriel. Given their history and connection in the Undertale lore, it's a possibility that some fanfictions might explore this relationship leading to Chara's pregnancy. Another could be a human character that somehow ended up in the Underground and formed a relationship with Chara.
The main characters would likely be the members of the chara defense squad. There could be a leader who is strong - willed and determined to protect the character. And then there might be other members with different skills, like one who is good at gathering evidence, and another who is a great fighter to defend against physical threats.
It's also possible that the fanfic author creates new characters to support the story. These new characters could be members of the 'army' led by Chara Dreemurr. They might have their own unique abilities and personalities that contribute to the overall plot and the development of the 'army' concept in the fanfic.
In a 'chara vs gaster fanfic', if the victory is determined by who has the stronger will, it could be a long - drawn - out battle. Chara has a strong will born out of their experiences, but Gaster's will might be equally strong considering his enigmatic nature and whatever his goals are in the story. It's really up to the creativity of the writer to decide who emerges victorious.
The main characters are Chara and Frisk. Chara is often a complex character with a troubled past in many interpretations. Frisk, on the other hand, is typically seen as the more positive and determined character who enters the Underground world.
Sasuke could be a great main character. He already has a complex backstory and a lot of internal conflict. In a Naruto Shugo Chara fanfic, his Shugo Chara could represent his search for revenge or his later - in the series - desire to protect the village. His journey of self - discovery could be enhanced by the addition of the Shugo Chara concept.
Chara Haven Fanfic is fan - made fictional works associated with Chara Haven. Fans write these stories for different reasons. Some want to explore different aspects of the characters they love from Chara Haven. Others might be inspired by the overall setting and want to create their own stories within it. There could be fanfics that are set in an alternate version of the Chara Haven world, with different rules or character traits, which makes it really interesting for both the writers and the readers.
It's not appropriate. While fanfic gives fans creative freedom, there are limits. The idea of cannibalism is a huge no - no in terms of morality and ethics. It can make people feel disgusted and uncomfortable. There are so many other positive and interesting themes that can be explored in fanfic, rather than this extremely dark and inappropriate one.