One common theme is the exploration of their relationship dynamics. Given their unique personalities in the original source, fanfictions often delve into how they interact with each other, whether it's a friendship - based story or something with more romantic undertones.
You can try fanfiction websites like Archive of Our Own (AO3). There are often a lot of fan - created stories about different pairings there. Just use the search function and type in 'Twice x Toga' and you'll likely find some interesting reads.
Fanfiction often takes liberties with the relationship between Izuku and Toga. It could also involve them teaming up against a common enemy. This would require them to put aside their differences and work together. Writers can use this to create exciting action - packed scenes and explore how they would communicate and cooperate in such a situation.
Toga is still alive in the manga. The creators haven't decided to end her character's journey with death. Usually, such major plot points are well-signaled and haven't happened for Toga so far.
One common theme is friendship. Since Twice is known for their close - knit group, fanfics often explore the deep friendships among the members. For example, stories might show how they comfort each other during tough times.
Maybe Toga uses his powerful abilities. He could have some special powers like super strength or the ability to manipulate time or space. With these, he might be able to stop Kikyo from harming Kagome.
In fanfiction, their relationship could develop through a common enemy. Suppose a new, powerful villain emerges who threatens both Toga's goals as a villain (in her own twisted way) and Izuku's mission to protect. They might be forced to team up against this foe. During their time together, they would learn about each other's strengths and weaknesses, and this could lead to a deeper understanding and a change in their relationship.
Their relationship could start with mutual self - interest. They both recognize the power and chaos the other can bring. For example, Toga's ability to transform could help Villain Deku infiltrate places, and he can offer her protection in return.