Trafalgar Law x Doflamingo Fanfiction: What are some interesting plot ideas?

One idea could be that the OC is a healer who joins Law's crew. They start off butting heads because Law is so used to being in control, but gradually he comes to rely on the OC's unique healing abilities and they develop a deep bond.

A plot could involve Doflamingo having some sort of debt to Law from their past that he doesn't remember clearly. Law decides to cash in on this debt which leads to a series of events where they have to interact more closely than they ever wanted. It could also be a story about a power struggle between them, not in a physical sense but in terms of influence in the pirate world.

One idea could be a story where Crocodile and Doflamingo have to team up against a common enemy that threatens their own interests in the New World. Maybe a new and powerful pirate crew that is disrupting their business operations. Another plot could involve a past encounter they had that changed their relationship, like a time when they were both rookies and something happened that led to a grudging respect for each other.

A possible plot could be set in an alternate universe where Doflamingo is not a villain from the start. He and Nami meet on an island where they both have a common goal, like finding a rare treasure. As they search for it, they start to bond over their shared love for adventure and discovery, and a romantic relationship begins to form between them.

One idea could be that they form an unlikely alliance to take over a powerful underworld organization. They start off distrusting each other but gradually realize they can achieve more together.

A crossover with 'Bleach' could be really cool. Law could end up in the Soul Society and his powers would be a mystery to the Shinigami. His ability to create 'Rooms' and manipulate objects within them could be seen as a threat or a new form of spiritual power. He might also get involved in the battles between the Soul Reapers and the Hollows, bringing his own brand of justice and strategy.

Maybe a crossover where Law ends up in a world full of magic. He has to use his medical skills and swordsmanship to survive. He meets a powerful mage who is intrigued by his powers. Together, they go on a quest to stop an evil force that is threatening to destroy both their worlds. Law's ability to create rooms could be really interesting in a magical setting, like using it to contain dangerous spells.

Law is very reserved and calculating, while Doflamingo is flamboyant and power - hungry. In a fanfiction, their interactions could show this contrast. For example, Law might be quietly planning his next move while Doflamingo is making grand declarations. Their conversations could be full of tension as Law tries to keep his cool in the face of Doflamingo's over - the - top behavior.

One idea could be Law somehow getting transported to the RWBY universe. He could team up with Team RWBY to fight against a common enemy, like a new type of Grimm that has some sort of devil fruit - like abilities. Another plot could involve Law using his Ope - Ope no Mi powers to heal some of the seriously injured characters in RWBY, which would lead to interesting interactions as they try to understand his powers. A third plot idea is that Law gets caught in the middle of the conflict between the different kingdoms in RWBY and has to use his strategic mind to navigate through the politics while also dealing with the threat of the Grimm.

Another plot could revolve around an OC who is a former victim of Doflamingo's cruel rule. This OC could be on a quest for revenge. They might start by gathering allies who were also affected by Doflamingo and then plan a elaborate scheme to take him down. Along the way, they could face many challenges and obstacles set by Doflamingo and his loyal followers.