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One idea could be that the OC is a new recruit in Night Raid. Leone takes the OC under her wing, and they gradually develop feelings through training together and going on missions. They could have a moment where they save each other's lives, which deepens their bond.
First, understand the characters well. Leone is tough but has a soft side, and your OC should have distinct traits that can interact with hers. For example, if your OC is shy, Leone could be the one to draw them out. Second, create a plot that involves both of them. It could be a mission - based plot where they have to rely on each other. Third, show their relationship development gradually. Don't rush into the romance.
To write a character - centric fanfic about Leone, first focus on her unique traits. Leone is strong, independent, and has a bit of a wild side. Start with her backstory, like her life in the slums which has shaped her. Then, put her in situations that test these traits. For example, a situation where she has to choose between her loyalty to Night Raid and her own moral code. Also, describe her physical actions in detail, like how she moves during a fight. This will bring her character to life.
One plot idea could be Leone discovers a hidden power within herself during a dangerous mission. This new power could be related to her animal instincts getting amplified. It might start with a near - death experience where she has to fight off a powerful enemy alone. Another idea is Leone having to form an unlikely alliance with a former enemy to protect the weak in the city. This would show her softer side and her sense of justice.
The main characters in Akame ga Kill novel include Akame, a skilled assassin. Tatsumi, a young villager who gets involved in the conflict. And Esdeath, a powerful and sadistic general. Akame is part of the Night Raid group which aims to overthrow the corrupt government.
The main characters include Tatsumi, a naive yet brave young man. Akame, a skilled assassin with a cold exterior. Leone, who has the ability to transform into a half - beast. There's also Mine, a sniper with a sharp tongue. And Bulat, a strong and noble warrior who mentors Tatsumi.