Another plot could involve them being chosen for a special mission by Dumbledore. Because they are the same age and have shown particular skills, Dumbledore thinks they can work well together. They have to travel to a far - off wizarding community to retrieve a powerful magical artifact. Along the way, they face many challenges and their relationship grows stronger.
One plot idea could be Tonks helping Harry to master some of the more difficult Patronus spells. Since Tonks is a skilled witch, she could offer unique insights and training methods. Another idea is that they go on a secret mission together to find out more about Voldemort's hidden lairs. They might have to use Tonks' Metamorphmagus abilities to their advantage.
One idea could be that Tonks gets involved in Harry's search for Horcruxes. Maybe her Metamorphmagus abilities help them in disguising and sneaking into places undetected. For example, she could transform into a Death Eater to infiltrate their meetings and gather information.
One idea could be that Tonks discovers a hidden vampire community in the wizarding world while on a mission related to Harry Potter. Maybe the vampires are being wrongly accused of attacking wizards, and Tonks, with Harry's help, tries to uncover the truth.
One plot idea could be a crossover where the magical world of Harry Potter collides with the vampire world of Twilight. Maybe Tonks and Alice Cullen team up to solve a mystery that involves both magic and vampire powers. And Tanya could be involved as a sort of rival or an ally depending on the story.
One plot idea could be that Tonks uses her Metamorphmagus abilities to help Harry in his undercover missions during the war. For example, she could change her appearance to infiltrate Death Eater strongholds with Harry. Another idea is that Harry discovers a new side of Tonks' personality that he didn't expect, and they bond over their shared experiences of loss. Maybe they both lost someone important to them in the fight against Voldemort and find comfort in each other.
Well, one idea is that Tonks uses her Metamorphmagus powers to create elaborate pranks around Hogwarts. She could change into different teachers or even inanimate objects to startle students and have some light - hearted fun. It would be a humorous take on her abilities.
One interesting plot could be the discovery of a new type of magic that was long forgotten in the wizarding world. Maybe it has the power to heal the most incurable dark magic curses.
One idea could be the cultural and family clashes that come with such a contract. Maybe Harry's friends are shocked and have mixed reactions. Another could be how Harry and Tonks grow to understand and care for each other in the context of this contract. For example, they start off as strangers in this arranged - like situation but gradually find common interests.
A possible plot is that Harry and Tonks time travel to a point where the creation of Horcruxes was just beginning. They could try to stop Voldemort from splitting his soul, which would change the whole course of the wizarding world's history. They would face many challenges, like not being discovered by Voldemort or his followers. Also, Tonks might use her skills to distract or mislead some of the Death Eaters while Harry looks for a way to destroy the Horcrux - making materials or the places where Voldemort hid them.
In a fanfiction, Tonks could be the one to introduce Harry to some of the more underground and less - known magical communities. This could lead to all sorts of adventures as they meet unique wizards and witches. Another plot could involve Tonks teaching Harry how to better understand and communicate with magical creatures, which could be useful in his future battles. Additionally, a story where Tonks and Harry are on a mission to protect a young, powerful, and endangered magical being from dark forces would be a great non - adult fanfiction idea.