Another interesting plot could be set in a post - apocalyptic version of Academy City. Accelerator and Last Order are among the few survivors. They have to rely on each other to survive, facing not only the physical challenges of finding food, shelter, etc., but also the psychological toll of being in such a desolate situation. Accelerator might have to learn how to be more gentle and nurturing towards Last Order, while Last Order could provide moral support and her own unique insights to help them get through the tough times.
One idea could be a story where Accelerator has to protect Last Order from a new and powerful enemy. Maybe this enemy is after Last Order because of her unique abilities and Accelerator has to use all his power and strategic thinking to keep her safe.
The character development in these fanfics can be really appealing. We can see how Accelerator, who is already a complex character, grows and changes in relation to Last Order. And Last Order herself can also have her character expanded upon. Writers can delve into their emotions, thoughts, and how they interact with each other on a more personal level, which makes the fanfics interesting to read.
One common theme is protection. Accelerator is often depicted as protecting Last Order from various threats in the fanfics. Since he has a sort of guardian - like relationship with her in the original work, this theme builds on that dynamic.
One common theme could be protection. Given Accelerator's power and his complex character, he might be seen as a protector of Last Order. Another theme could be friendship evolving into something more, as they interact more in the fanfic stories.
I'm not sure which specific 'last order x accelerator' fanfic to recommend offhand. You could try searching on fanfic websites like Archive of Our Own. They usually have a wide variety of fanfictions for different pairings.
The theme of redemption can also be seen in some Accelerator Last Order fanfictions. Given Accelerator's past actions, some writers explore how his relationship with Last Order can be a part of his path towards redemption. He might find new purpose in protecting her and making up for his previous misdeeds. Also, there are fanfictions that involve them facing off against new and powerful enemies together, highlighting their teamwork and the bond between them.
One idea could be that the last dragon is discovered by a young adventurer. They form an unlikely bond and together they set out to find a way to save the dragon's kind from extinction. Maybe there are ancient prophecies or hidden magic involved.
One idea could be exploring an alternate timeline where Aang fails to defeat the Fire Lord. Maybe in this timeline, the Fire Nation completely takes over the world, and the remaining benders have to go into hiding and plan a long - term resistance. Another plot could be focusing on a new airbender discovered long after Aang's time, and their journey to master airbending without the guidance Aang had.
A cool plot for 'the last kingdom fanfic' might be to have a character be transported back in time to a crucial moment in the kingdom's history. They would have the knowledge of what's to come but struggle to convince others to believe them. This could lead to all sorts of interesting twists. Or you could write about a character who is secretly training a group of women to be warriors in a society that doesn't really accept that. It would be about breaking gender norms and the challenges they face in a war - torn world.
One approach could be to introduce a third party that tries to come between them. This could be a character who is jealous of their relationship or has some ulterior motives. As Accelerator and Last Order face this external threat together, they will become more aware of their feelings for each other. Additionally, having them share personal secrets or dreams can strengthen their relationship. For example, if Last Order tells Accelerator about her hopes for the future of Academy City, and Accelerator reveals his own insecurities and how he wants to change for the better. This mutual sharing will make their connection more profound.
You can try looking on fanfiction websites such as Archive of Our Own (AO3) or FanFiction.net. These platforms usually have a wide range of fanfics, including ones related to Accelerator and Last Order. Just use their search functions to look for specific titles or keywords.