One common theme is family discovery. Since she's traveling back to a time when her father was younger, she gets to see a different side of him and understand their family history better.
One great fanfiction could be 'The Lupin Legacy in Time'. In this story, Remus Lupin's daughter travels back in time and meets her father as a young wizard. It's full of heartwarming moments as she tries to help him without revealing her true identity.
One common theme is the clash of different worlds. For example, when Lupin enters a non - magical world, like in a crossover with a detective story world. There's also the theme of friendship. Lupin often forms new friendships with characters from other universes. For instance, in a crossover with a superhero world, he becomes friends with the heroes.
One common theme is acceptance. Since Remus is a werewolf, often the female character has to accept him for who he is, and vice versa. For example, in many stories, the female character helps Remus come to terms with his lycanthropy and they find strength in each other's acceptance.
One common theme is friendship. The OC often becomes a very close friend to Remus, sharing in his joys and sorrows. For example, they might be there for him during his difficult full - moon times.
One common theme is isolation. Remus often feels alone because of his werewolf condition, and fanfictions explore how this isolation hurts him deeply, cutting him off from normal social interactions.
One great Remus Lupin time travel fanfiction is 'Time's Twist with Remus'. It has an interesting plot where Remus travels back to his school days and tries to change some of the events that led to his difficult life. The character development in it is really well - done.
Well, his past traumas are a common theme. Fanfics like 'Remus's Burden' explore how his childhood and the events with the Marauders' deaths have affected him. His struggle for acceptance in the wizarding world is another theme. 'Accepted at Last' is a fanfic that shows his journey to be fully accepted. And his connection to magic related to the moon is also a theme, as in 'Moon Magic and Remus' which weaves magic and his lycanthropy together.
Well, there's the theme of adventure. They were part of the Marauders after all. Fanfictions often send them on new adventures, whether it's exploring a new part of the wizarding world or solving a mystery. Then there's the theme of sacrifice. They are willing to sacrifice for each other. This can be seen in many stories where one puts himself in danger to save the other. And the theme of love - not necessarily romantic love, but a deep, platonic love that is very strong between them.
Love against all odds is a very common theme. Given Remus' condition as a werewolf, they face a lot of opposition and prejudice. Fanfictions often explore how their love overcomes these difficulties.
There is also the theme of growing up. Fanfictions show how they change and develop from their school days to becoming more responsible individuals. Additionally, the theme of sacrifice sometimes appears, as they were willing to do a lot for each other and their friends.