One possible plot could be Tatsumi and Mine going on a secret mission together. They might face a powerful and unexpected enemy, and during the battle, they discover new abilities within themselves and grow closer as a result. Another plot could be a story set in a peaceful time after the main events of Akame ga Kill. Tatsumi and Mine are trying to build a new life, but they still have to deal with the traumas of their past.
Perhaps a plot where Tatsumi gets injured badly and Mine has to take care of him. During this time, she realizes just how much he means to her. Or it could be a story where they are both framed for a crime they didn't commit and have to work together to clear their names. They would have to rely on their skills and their trust in each other.
Growth and redemption are also themes. Tatsumi and Mine have both done things they might regret, and fanfictions can show them growing as characters and finding redemption. For example, they might try to make up for past mistakes by helping those in need. Additionally, friendship is a theme, as their relationship is also based on a strong friendship that has developed over time.
How about a plot where both Naruto and Mine are summoned by a powerful being who wants to test the limits of different types of warriors. Naruto and Mine are pitted against other powerful characters from different universes. At first, they are reluctant to work together because of their different backgrounds and ways of fighting. But as they face stronger opponents, they realize that they need to combine their skills. Naruto's Rasengan and Mine's Pumpkin could be used in a combined attack. And during this time, they also develop a friendship that transcends their different worlds.
There is a fanfic titled 'Female Tatsumi: The Hidden Power'. In this, female Tatsumi discovers a special power within herself. It's really engaging as it shows her growth and how she uses this power to face the challenges in the story. It also has some great action scenes.
In the Akame ga Kill manga, unfortunately, Mine's fate was death. This event had a significant impact on the storyline and the characters around her.
One common theme is empowerment. Since Tatsumi is female in these fanfics, she often has to overcome gender - based challenges in the harsh world of Akame ga kill. Another theme is self - discovery. As she faces different situations, she discovers more about herself.
In this fanfiction scenario, Tatsumi might initially be lured by the false promises of the Empire. He could start to see the power and glory they seem to offer. However, as he gets deeper into the Empire's inner workings, he would likely start to notice the corruption and cruelty. Maybe he'd try to change things from within at first, but eventually, he'd probably realize that the Empire is beyond redemption and turn against it, just like in the original story but with a more complex internal struggle.
In 'Akame ga Kill', Tatsumi and Esdeath's relationship is complex. Esdeath falls deeply in love with Tatsumi. However, Tatsumi is on the side opposing Esdeath's cruel ways. Esdeath's love is intense but possessive. She tries to make Tatsumi hers, but Tatsumi is committed to his comrades and the revolution. Their love story is tragic as they are on opposite sides of a great conflict.
Tatsumi doesn't really welcome Esdeath's love. He sees her as an enemy due to her actions in the empire. Her brutal ways and her role in oppressing the people are things Tatsumi is fighting against, so he can't return her feelings of love.
One way their worlds could collide is through a crossover event. Maybe a powerful villain uses some sort of dark magic or technology to bring characters from both Naruto and Akame ga Kill together. For example, they could be forced to fight in a gladiator - like arena where the only way to survive is to team up with unlikely allies. Naruto's skills in ninjutsu and his strong will would be an interesting contrast to Mine's use of her Teigu and her sharpshooting abilities.
One interesting concept could be the exploration of different powers. In this fanfiction, new powers related to the Reincarnation Emperor might be introduced, which could add a whole new layer of action and strategy to the story.