One common theme is the idea of finding love in the midst of chaos. Given the war - torn world they live in, their love can be a haven. Another is the exploration of Tonks' unique abilities as a Metamorphmagus and how that adds an interesting dynamic to their relationship. For example, she might change her appearance to make Harry laugh or to show her different moods related to their relationship.
Well, a common theme is the age difference between them being a bit of a hurdle at first. In many fanfictions, they have to overcome the fact that Tonks is a bit older. Also, the theme of loyalty often comes up. Tonks' loyalty to the Order and Harry's loyalty to his friends and the fight against Voldemort play into their relationship. They support each other in their respective battles, and this strengthens their bond. Additionally, the idea of healing is also there. Harry has so much trauma, and Tonks can be a source of comfort and healing for him, and vice versa.
In many of these fanfictions, the theme of acceptance is important. Tonks has her own unique abilities like being a Metamorphmagus, and Harry has his fame and burdens. They have to accept each other fully. Another common theme is the power of friendship that could potentially turn into love. Their initial friendship or acquaintance can be a foundation for a deeper romantic relationship, and this is often explored in these fan - created stories.
One common theme is the idea of forbidden love. Since Tonks is older and part of the Order of the Phoenix, there's a sense of this relationship being something that might not be accepted easily. Another theme is sacrifice. They both are involved in the fight against Voldemort, so they might have to sacrifice their love for the greater good.
The theme of growth through love is also common. As they fall in love, both Harry and Tonks grow as individuals. They learn from each other and become better versions of themselves. In some fanfics, Harry might become more open - minded because of Tonks, and Tonks might become more focused on important matters because of Harry.
Well, a frequent theme is the exploration of Tonks' unique personality. Her being a bit of a free - spirit and how that interacts with a romantic relationship. Also, loyalty is often a theme. In the Harry Potter world, loyalty is crucial, and in these fanfictions, it can be shown through how Tonks and her love interest support each other during difficult times. Additionally, the theme of acceptance, both of Tonks' abilities and of each other's flaws in the relationship.
One common theme is the forbidden love aspect. Given their age difference and Tonks' relationship with Lupin in the original series, it creates a sense of something that shouldn't be but is. Another theme is the idea of them finding solace in each other during the dark times of the wizarding war. Harry is often burdened with so much, and Tonks, with her own struggles, can offer him a different kind of support and vice versa.
One common theme is the struggle against prejudice. Since they are an unusual couple in the wizarding world, they often face judgment from others.
A major theme is the exploration of their unique magical abilities. Tonks' Metamorphmagus ability and Harry's connection to Voldemort are often used as plot devices. For example, some fanfictions have Tonks using her ability to help Harry in some way. Also, the theme of sacrifice is common. Since both are in the fight against the Dark side, they may have to sacrifice things for the greater good in these stories.
The theme of self - discovery is also present. Through the betrothal, Harry and Tonks learn more about themselves. They discover new aspects of their personalities, their likes and dislikes, and how they can grow as individuals while being in this unique relationship. This is often shown through their interactions with each other and how they face challenges together.
Often, there could be a theme related to Tonks' identity as a metamorphmagus and how that affects her pregnancy. Maybe she has to be careful not to accidentally change her form in a way that could harm the baby. Also, the theme of protecting the unborn child from the various threats in the wizarding world, like dark wizards or magical creatures, could be present in these fanfictions.
One common theme is family secrets. Since it's not part of the original story, the discovery of their sibling relationship often involves uncovering long - hidden secrets. Another is loyalty. They would show loyalty to each other as siblings in the face of various challenges in the wizarding world.