A less common but still present theme is the idea of breaking barriers. Undyne has a certain way of life and set of beliefs in the game, and in some fanfics, the relationship with the reader helps her break those barriers, whether it's in terms of her view of humans or her own self - imposed limitations. This makes for some really interesting character development in the 'undyne x reader fanfic'.
Friendship turning into love is also a very common theme. At first, the reader and Undyne might start as friends, but as the story progresses, their relationship deepens into something more romantic. And of course, the theme of loyalty. Undyne is a very loyal character, and this is often emphasized in the fanfics as she stands by the reader through various situations.
Overcoming challenges is also a big theme. Maybe there are challenges in their relationship due to differences in their nature (Undyne being a tough warrior and the reader perhaps being more timid). Or they might face external challenges like threats from other characters in the Undertale world, and they have to work together to overcome them and in the process, their relationship deepens.
Common themes include self - discovery. The male reader may start off not knowing much about himself or his place in the Underground, and through his relationship with Undyne, he learns more about who he is. Also, loyalty is a big theme. Undyne is a very loyal character, and the male reader has to prove his loyalty to her in many fictions. Additionally, there's the theme of protection. Undyne is a protector in the Underground, and in the fanfictions, she often tries to protect the male reader, and he may also try to protect her in return.
One common theme is the exploration of friendship. Despite their differences, sans and undyne can form a unique bond in many fanfics. For example, they might start off as rivals but gradually become friends through shared experiences.
Common themes include redemption and acceptance. Undyne may have to accept Frisk's non - violent ways, and Frisk may help Undyne see a different side of things, which is a form of redemption for her more violent tendencies. Additionally, loyalty is often explored. As their relationship develops, they show loyalty to each other in the face of various threats and challenges in the Underground.
One common theme is friendship turning into love. They start as friends or acquaintances, and as the story progresses, they realize they have deeper feelings. For example, in many fics, they begin by collaborating on something, like a scientific experiment or a community project.
One common theme is friendship. Since the reader is often involved, it shows how they build a friendship with Undyne, like learning to understand her warrior - like nature.
One common theme is friendship. Since their relationship in the Underswap world is different from the original, fanfics often explore how they become friends first. For example, they might bond over a shared interest in cooking or training.
The theme of growth is often seen. Both characters grow as individuals within the relationship. Alphys may become more outgoing and Undyne may become more empathetic. Also, the theme of adventure in their relationship is present in some fanfictions, where they go on adventures together in the Underground, strengthening their bond along the way.
Growth is also a common theme. Frisk may grow in confidence and strength under Undyne's influence, while Undyne might become more understanding and less hot - headed because of Frisk. And of course, there's the theme of adventure. Since they are in the Underground world which is full of mysteries, many fanfictions have them going on adventures together, facing monsters and solving puzzles.
She is also very determined. This trait can make for an interesting dynamic in the fanfiction. If the reader is facing a difficult task, Undyne's determination can inspire them. She won't give up easily, and that attitude can rub off on the reader and help them grow as a character.