Well, in fanfiction about Shoto Todoroki and Momo, a common theme is their growth together. Since they are classmates in the hero school, they are likely to be involved in many group activities. In these fanfictions, they might face challenges as a team. Shoto's cool - headedness and Momo's creativity can combine to overcome difficulties. Their relationship could also be influenced by the overall plot of the fanfiction, such as if there is a big villain threat. In that case, they may have to rely on each other more, which could strengthen their bond, whether it's a friendship or something more romantic.
One popular trope is the 'study buddies' trope. Since Momo is very smart, she could help Shoto with his studies, especially in areas where he might struggle, like theory - based hero knowledge. Another is the 'saving each other' trope. In a dangerous situation, Shoto might use his powers to save Momo, or vice versa, which then deepens their connection. And there's also the 'slow - burn romance' trope, where their feelings for each other develop gradually over time through small interactions and shared experiences.
One common theme is growth. Both Shoto and Momo are often shown growing as individuals and as a couple. For example, they might learn to overcome personal insecurities with the support of each other.
There's a fanfiction called 'Together in the Training Ground'. In this story, it focuses on their time training together. It delves into how their different quirks complement each other during combat training, and also shows the budding romance between them. They start to understand each other on a deeper level, which is really interesting to read.
Often, there is the theme of inspiration. Deku is very inspiring in the original story, and in fanfiction, he can inspire Shoto to be a better hero. Also, self - discovery. They both are on a journey to discover more about themselves, their powers, and their place in the hero world. In fanfiction, this journey can be elaborated on in different and interesting ways.
One common theme is redemption. Dabi, with his troubled past, often has a journey towards redemption, and Shoto can play a part in that. Another theme is family. Given their complex family relationships in the original story, fanfics often explore how they deal with family issues together.
No, it is not appropriate. Creating or distributing sexual fanfiction involving underage or fictional characters in a sexual context is unethical and often violates the terms of use of various platforms. Such content can also be considered a form of inappropriate objectification.