Since I'm not very familiar with this specific type of fanfiction, it's hard to say for sure. But perhaps themes like friendship, cooperation, or the development of a unique bond could be common, as reaction time might imply some sort of interaction and 'kyutie' could be a character with certain qualities that lead to interesting relationship dynamics.
One possible common theme could be competition. If 'reaction time' is a crucial factor, there could be scenarios where characters compete, and 'kyutie' is either a competitor or a supporter. Also, themes of discovery might be present. The characters could be discovering new things about 'kyutie' or about themselves as they face situations that test their reaction time. Additionally, themes of loyalty might emerge as the characters support each other in situations where reaction time is vital.
Common themes could potentially include growth. For example, the characters might grow in terms of their reaction time skills while also developing their relationship with 'kyutie'. Another theme could be adventure, where the need for quick reaction time comes into play during exciting events, and 'kyutie' is part of the adventure crew. Mystery could also be a theme if there are elements related to the nature of 'kyutie' or the reasons behind certain reaction time requirements.
There may not be a lot of widely known 'kyutie and reaction time fanfiction' readily available. However, you could also check fanfiction.net. Sometimes, less mainstream pairings can be found there. Just use the search function to look for works related to these two elements.
Unrequited love is a common theme. One person may love the other deeply while the other doesn't feel the same way or is unaware of the love. For example, a girl may have a crush on a boy who only sees her as a friend.
Reactions to changes in the Supernatural world itself are quite common. Maybe a new law or rule has been established in the world of demons and angels, and we see how the characters respond. Additionally, the theme of reactions to loss is prevalent. When a character is lost, either temporarily or permanently, the others' reactions are explored, which can be very emotional and add depth to the story.
One common theme is separation. Fans often write about how hard it is for the characters to say goodbye to their dragons, like Hiccup and Toothless. It's a very emotional moment that many fanfiction writers explore.
Mystery is also a common theme. There are fanfictions where the origin or true nature of certain elemental reactions is a mystery. The characters then embark on a journey to uncover the secrets. Additionally, some fanfictions focus on the cultural aspects of Genshin Impact, and how different regions have different attitudes towards elemental reactions.
A frequent theme is the exploration of character relationships in the future. For instance, how do Naruto and Sasuke's relationship evolve further? And how do other characters react to this? Also, the theme of facing new, more powerful threats together often appears. Characters' reactions to these threats can vary from determination to fear.
One common theme is the reaction to power. For example, when a character reveals a new level of power, how others in the story respond. This can range from shock to envy.
One common theme is character development. Since it's reaction - based, it often shows how characters grow and change in response to different events. For example, Kirito might react to a new threat in the game, and through that, we see his character evolve.
One common theme is the exploration of the consequences of alchemy. In Fullmetal Alchemist, alchemy has a price, and fanfictions often delve deeper into how characters deal with those consequences, both physically and emotionally. Another theme is the relationship between the brothers, Edward and Alphonse. Fanfictions might explore different scenarios of their bond, like how they support each other in new and challenging situations.
One popular theme could be adventure. For example, Reaction Time Bro might go on an epic journey in a fictional world filled with magic and mystery. Another theme could be friendship. He might form strong bonds with other characters and they overcome challenges together. And of course, competition can be a theme too, where he shows off his skills in various contests within the fan - made story.