What are the common themes in gaster x reader fanfic?

Well, a major theme is the exploration of the unknown. Gaster's nature and his past are often shrouded in mystery in the original source, so in fanfiction, the reader and Gaster might embark on a journey to discover things together. Also, the theme of redemption can be present. Gaster may have some past mistakes or regrets, and the relationship with the reader could be a part of his path to redemption. Additionally, there can be a theme of power imbalance at times, as Gaster might have more knowledge or power, and how the reader deals with that in the relationship is explored.

A sense of otherworldliness is common too. Since Gaster Sans is from a rather strange and unique universe, the fanfictions often play with the idea of the reader being in a very different, almost alien world. This can lead to themes of adjustment, as the reader tries to fit into this new world while being in a relationship with Gaster Sans.

Power and knowledge are also common themes. Gaster is often depicted as having a great deal of knowledge, and his experiments might be related to power in some way. Fanfics explore how this knowledge and power can be both a blessing and a curse. They might also show how other characters react to Gaster's power and knowledge, whether it's with fear, envy, or admiration. In addition, some fanfics have a theme of redemption. Since Gaster's actions may have caused some chaos or harm, the fanfic could be about him trying to make amends in some way, either directly or through the actions of others he has influenced.

One common theme could be the exploration of their relationship in the context of the outertale universe. It might involve how they interact with the unique settings and other characters in that AU.

One common theme is mystery. Since both Gaster and Sans have mysterious backstories in the original game, fanfictions often explore and expand on these mysteries, especially in relation to their relationship.

One common theme is loyalty. They are both important figures in the monster world, and stories often explore how loyal they are to each other and to their respective causes.

One common theme is mystery. Since both characters have elements of mystery in their original lore, fanfictions often explore that further. Another theme is power dynamics. Given their different abilities, how they interact in terms of power is often explored. And friendship or a deeper connection is also a common theme as writers like to explore the relationship between these two unique characters.

The theme of shared interests also pops up a lot. Since Kenma loves video games, many fanfics show the reader and Kenma bonding over games, whether it's playing together or just discussing their favorite titles. This shared interest helps to strengthen their relationship.

One common theme is friendship - turned - love. It often starts with the reader and Pidge being friends or comrades, and then romantic feelings start to develop. Another theme is adventure. Since Pidge is often involved in exciting situations, the reader gets to be part of those adventures too, and their relationship blossoms during those times.

Love and redemption are common themes. Since Sasuke has a troubled past, often the reader character is there to help him find redemption and in the process, they fall in love. For example, in many fanfics, the reader's love and understanding slowly change Sasuke's view of the world.