One possible plot could be that Gibbs helps Harry uncover some secrets about his parents that even the wizarding world doesn't know. Since Gibbs is a master at investigating, he could use his skills to dig into the past. Maybe there are some hidden connections between Harry's family and some muggle affairs. Harry, under Gibbs' guidance, could start to see the wizarding world from a different perspective, combining the practical thinking of Gibbs with his own magical abilities.
In such a fanfiction, Harry's life would take a huge turn. Gibbs has his own set of values and ways of doing things. He'd probably instill in Harry a sense of loyalty and responsibility that is different from what Hogwarts offers. Harry might also be exposed to a world without magic for a while, which could make him appreciate his wizarding abilities more when he finally gets back to that world. And Gibbs would surely protect Harry with his life, just like he does with his team members in his own show.
He might become more stoic. Gibbs' influence could make Harry hold his emotions in check more. Instead of being so impulsive sometimes, he'd think before acting.
Yes, there might be. The 'Harry Potter' and 'NCIS' (where Gibbs is from) fandoms are quite large, and it's not uncommon for fans to create crossover fanfictions. You can try searching on popular fanfiction websites like Archive of Our Own or Fanfiction.net.
Kelly Gibbs in 'Harry Potter' fanfiction could also be a character who is related to an existing character in the series in some way. She could be a distant relative of a Hogwarts professor or a long - lost family member of one of the main characters. This connection could bring new storylines and dynamics to the fanfiction, such as uncovering family secrets or using her family ties to gain access to certain parts of the wizarding world that were previously off - limits.
Well, in this 'harry potter son of gibbs fanfiction', it could be that the author is exploring a whole new set of relationships. Harry, being the son of Gibbs, might have a different upbringing. Maybe he has Gibbs' sense of justice and determination, which would affect how he approaches the magical world. For example, he could use Gibbs' methods of investigation in solving mysteries within Hogwarts or the wizarding community at large. Also, it could lead to some interesting interactions with the existing Harry Potter characters like Hermione and Ron, as they might be intrigued by Harry's different family background.
One common theme is the clash of two different worlds. Gibbs comes from a more 'normal' (if you can call his world normal with all its crime - solving) world, and Harry Potter is from the magical wizarding world. So, there's often a theme of adjustment and adaptation as they interact.
In a 'Harry Potter is Gibbs' nephew' fanfiction, the plot could start with Harry's discovery of his relation to Gibbs. This could lead to him spending time in the Muggle world, learning about Gibbs' work and life. As he grows, he might find ways to incorporate his magic into solving problems in the Muggle world that Gibbs and his team face. There could be a conflict where the wizarding world authorities are not happy about Harry's close ties to the Muggle world. At the same time, Gibbs' team might have a hard time accepting the existence of magic at first. But through various adventures and challenges, they all learn to work together. Harry could use his magic to enhance the forensics work in NCIS, like using a spell to detect lies during interrogations. And Gibbs could teach Harry about loyalty and perseverance in a way that is different from what he has learned in the wizarding world.
One common theme could be the clash of two different worlds. Jethro Gibbs comes from a world of crime - solving and military discipline, while Harry Potter's world is full of magic. So, there's often the exploration of how these two worlds interact. Another theme might be Gibbs using his skills to protect the wizarding world or help Harry and his friends.