One major theme is the idea of redemption and acceptance. Todoroki has issues with his father, and Deku has his own self - worth struggles. Fanfics often explore how they help each other accept themselves fully. Also, the theme of teamwork is prevalent. They work together in battles in the original story, and in fanfics, this teamwork can translate into a stronger emotional bond off the battlefield.
Love and support is a huge theme. Deku is known for his kind heart and Todoroki for his growth throughout the series. In fanfics, they often provide love and support to each other. For example, Deku might encourage Todoroki to embrace his fire side, and Todoroki might be there to boost Deku's confidence when he doubts himself. This mutual love and support can be the central focus of many fanfics.
One common theme is friendship development. Since they are classmates and both aiming to be heroes, many fanfics explore how they become better friends. Another theme is mutual growth. They learn from each other's strengths and weaknesses, like Deku's spirit inspiring Todoroki and Todoroki's powerful quirk making Deku strive to improve more.
Common themes include the exploration of their individual insecurities. For female deku, it might be about not being strong enough at first, and for todoroki, his family issues. As they come together, they help each other deal with these. Also, the theme of finding a true connection in a world full of chaos is often there. Their relationship becomes a sort of haven in the midst of all the hero - related chaos. There's also the theme of acceptance, accepting each other's flaws and strengths.
One common theme is possessiveness. Since Todoroki is yandere, he often wants to keep Deku all to himself. Another theme is the struggle between Deku's own agency and Todoroki's overbearing love. For example, Deku might want to pursue his hero career and have other friends, but Todoroki's yandere nature tries to limit that. Also, there's the theme of secrecy. Todoroki may try to hide his yandere tendencies from Deku and others at first.
Power imbalance is often a theme. Deku might gain new, more dangerous powers as a villain, and Todoroki has to figure out how to deal with that. There could also be a theme of trust. Since Deku is a villain, Todoroki has to decide whether to trust him or not. And if he does trust him, it could lead to all sorts of complications in the story.
Friendship is a very common theme. Given their different backgrounds and personalities, seeing how they become friends and support each other is often explored. For example, female Todoroki may come from a more troubled family situation compared to the optimistic female Deku, and their friendship can be a source of healing for both.
A common theme is rivalry -turned - friendship. Since they start as rivals in the original story, many fanfics explore how they overcome their initial animosity. For example, in some fanfics, they realize they have more in common than they thought when it comes to their family issues.
One common theme is the exploration of their complementary personalities. Todoroki is often seen as reserved and Momo as intelligent and responsible. Fanfics like to show how these traits can create a harmonious relationship.
One common theme is redemption. Since Endeavor has made many mistakes in the past regarding his family, especially with Todoroki, many fanfics focus on him trying to redeem himself. Another theme is forgiveness. Todoroki has to decide whether to forgive his father or not. And also, family bonds. They are father and son, so exploring how they can strengthen or repair their family connection is often seen in these fanfics.
One popular type might be the friendship - centric ones. These fanfics explore the complex relationships between Todoroki, Deku, and Bakugou. They often show how their different personalities interact and how they grow to understand and support each other. For example, a fanfic could focus on their training sessions together, where they learn from each other's strengths and weaknesses.
The exploration of their insecurities is a theme as well. Deku might worry about being a worthy hero for Uraraka, and Uraraka could be insecure about not being strong enough compared to Deku. Fanfics often deal with how they overcome these insecurities and grow closer as a result.