One idea could be that the OC is a time - traveler who accidentally lands in Caulifla's universe. The OC has unique powers that Caulifla is intrigued by, and they start training together. This could lead to a friendship that slowly turns into something more as they face various challenges together in the tough Saiyan - filled world.
A common theme is the power - up journey. With Caulifla and Kale being Saiyans, many fanfictions focus on how an OC can either help them in their power - up quests or be inspired by them. Another theme is friendship. The OC might form deep bonds with Caulifla and Kale, going through various adventures together and relying on each other.
For Caulifla, study her personality from the original source. She's strong - willed, competitive, and has a Saiyan's pride. For the OC, give them a clear backstory. For example, if they're from a different planet, explain what that planet was like. Also, show how they interact with Caulifla. If the OC is shy, their initial interactions with bold Caulifla can be really interesting.
You can try looking on fanfiction websites like Archive of Our Own (AO3). There are a large number of writers who create stories in this category. Just search for 'oc x caulifla x kale' in the search bar, and you'll be presented with a variety of fanfictions to choose from.
A fanfiction could focus on Cabba teaching Caulifla about his Saiyan heritage from Universe 6. He could share stories of his training and the values he holds dear. This could lead to Caulifla becoming more interested in her own Saiyan roots and the two of them developing a deeper connection through this cultural exchange.
In a Cabba x Caulifla fanfiction, they might go on adventures across different universes. Imagine them facing powerful foes together and relying on each other's unique skills. Cabba's ability to quickly analyze a situation and Caulifla's fearless nature would make them a formidable team. Their bond could deepen as they share these experiences and discover new things about themselves and each other.
One idea could be a story where Cabba helps Caulifla and Kale train for a big tournament. They face various challenges together and Cabba's unique fighting style influences the sisters to develop new techniques. In the end, they all become stronger and their friendship deepens.
Well, a Goku x Caulifla x Kale fanfiction could potentially be about their adventures together in a new setting. Maybe it could involve them teaming up against a powerful enemy and during that time, their relationships grow and develop in interesting ways. However, 'lemon' usually implies some inappropriate or adult - themed content, which is not something I would encourage. So if we focus on a non - inappropriate version, it could be a story full of friendship and mutual growth.
Well, perhaps the OC is a master of a rare form of martial arts. Caulifla, being the battle - hungry Saiyan - like character she is, challenges the OC. During the fight, the OC shows not only great combat skills but also a sense of honor and justice. This catches Caulifla's attention. Later, they find themselves on the same side against a common enemy and their relationship blossoms from there. They could also have cultural exchanges, as the OC might come from a very different culture within the One Piece universe.