Often, there might be themes of adventure. Maybe they go on a journey together in the fanfiction, facing various challenges and enemies. Another theme could be self - discovery. As they interact with each other, they might learn more about themselves. For example, Broly could discover a softer side of himself through his interactions with Chirai, and Chirai could become more confident in the face of danger when with Broly.
Often, there could be themes related to adventure. Since they are from the Dragon Ball universe, they might embark on some sort of journey together, and their relationship could be developed during that. Maybe they face some powerful enemies and their bond grows stronger as they fight side by side. It's also possible that there are themes about self - discovery, where through their relationship, they learn more about themselves and their place in the world.
I'm not sure specifically which 'broly x chirai fanfiction' stories are out there. You could try searching on popular fanfiction websites like Archive of Our Own or FanFiction.net.
I'm not sure of specific 'broly x chirai fanfic' stories off - hand. But you can try searching on fanfic platforms like Archive of Our Own. There might be some great works there.
In Broly and Chirai fanfic, the theme of discovery is quite common. They could be discovering new abilities, new places, or even new aspects of themselves. Another prevalent theme is conflict. It could be an external conflict like fighting against an evil force or an internal conflict within themselves. And of course, the theme of unity. How they come together despite their differences to face challenges is often explored in these fanfics. There are also fanfics that focus on the theme of redemption, where one or both of them have something in their past they need to make up for.
One great Broly and Chirai fanfic is 'The Adventure of Broly and Chirai'. It has an interesting plot where they go on a journey across different planets. Another one is 'Broly and Chirai: Bond of Friendship' which focuses on how their friendship develops in a unique situation. There's also 'Broly, Chirai and the Mysterious Power' which involves them facing a powerful enemy and having to unlock a hidden power within themselves.
It could also be a rivalry - turned - friendship. At first, they might see each other as competitors, constantly trying to outdo one another in battles or power displays. But over time, they come to respect and care for each other. For example, a story could start with them competing in a tournament and end with them teaming up against a common enemy.
One great 'broly chirai fanfic' is 'Broly's New Journey' which explores Broly in a different universe. It has an interesting plot that keeps you hooked from the start.
One popular theme is the exploration of Broly's character development in relation to Chirai. Maybe showing how their relationship could change Broly from his usually berserk state. Another theme could be adventure, with them teaming up to face new threats in the Dragon Ball universe.