Well, it could be that Akira has been wronged by Persina in some way, like Persina stealing Akira's idea or betraying a trust. So Akira is angry and sets out on a journey to confront Persina and get justice. Maybe Akira teams up with some friends along the way who also have a bone to pick with Persina.
Perhaps Persina made a promise to Akira and broke it, which made Akira angry. The plot could revolve around Akira trying to make Persina understand the pain she caused. Akira might start off being really furious but as the story progresses, they both realize there were misunderstandings on both sides. It could be a story of forgiveness in the end, but first there would be a lot of drama and conflict with Akira being angry at Persina.
I'm not sure specifically if there is an 'angry akira persina fanfic' out there. You could try searching on popular fanfic websites like Archive of Our Own or Fanfiction.net. Sometimes it might be hard to find a very specific one like this, but with some thorough searching, you might get lucky.
It could be about Akira's journey home. Maybe he faces various obstacles on the way, like bad weather or difficult terrain. He might also meet some interesting characters during his trip.
One possible plot could be that Beast Boy gets angry because his friends don't trust his new animal form discovery. He feels isolated and lashes out at them, causing chaos in the Titans' tower. His anger might lead to him running away and getting into trouble in the city, where he has to face his emotions and learn to control his powers better while his friends search for him.
The fanfic could be about Pikachu getting angry when a new powerful Pokemon arrives in the area and starts bullying the other Pokemon. Pikachu, being the brave little Pokemon it is, stands up to the bully. At first, it loses battles due to its anger getting the best of it. But with the support of its friends, it manages to channel its anger into strength and defeats the bully.
The fanfic could start with Harry being called to trial for something like using underage magic, which he didn't actually do. He is angry because he has been through so much already, fighting Voldemort and his Death Eaters, and now he has to face this unjust trial. His anger could fuel him to find evidence on his own to prove his innocence. He might start investigating who really cast the magic in question, leading him on a new adventure while still in the middle of the trial drama.
Well, the plot could involve Red and Silver teaming up to face a new threat in the Angry Birds world. Maybe a super - powerful pig invades their territory and they have to combine their unique skills to defeat it.
Well, it could be about Red and Stella going on an adventure together. Maybe they team up to save their bird friends from some new threat in the Angry Birds world. They could start off not getting along so well, like in many stories where two different characters have to learn to work together. And as they face challenges, they gradually understand each other better and form a strong bond.
One possible plot could be that a member of Monsta X gets angry because of unfair treatment in the music industry. For example, they might be angry about their group not getting the recognition they deserve for their hard - worked music. The story could then follow how they deal with this anger, whether it's by working even harder to prove themselves or by confronting those who are causing the unfairness.
Another reason could be if someone were to slander or disrespect his late mentor, like Iruka or Jiraiya. Naruto holds these people in high regard, and any negative remarks or actions towards them would likely enrage him.
It could be that the angry man is a new vampire who is angry at his maker for turning him. In the Twilight world, the transition to vampirism can be a difficult one, and if he wasn't given a choice, he might be full of rage.