Well, first of all, they have very distinct personalities. Tonks is this fun - loving, shape - shifting witch, and Lupin is the more brooding, intelligent wizard. Their contrast makes for an interesting dynamic. Also, their relationship in the canon is somewhat underdeveloped, so fanfiction writers get to fill in the gaps. They can explore how Tonks first fell in love with Lupin, how Lupin overcame his self - doubt to be with her, and all the little moments in between that we didn't get to see in the books. It's like they are a blank canvas waiting to be painted by creative minds.
One possible reason could be his self - loathing due to his werewolf condition. He might think he's not good enough for Tonks and that she'd be better off without him, fearing that his lycanthropy could bring danger or a difficult life to her.
One great Lupin and Tonks fanfiction is 'The Lupin - Tonks Story' on FanFiction.net. It really delves into their relationship, from their initial meetings to the deeper emotional bonds. The writer captures Tonks' free - spirited nature and Lupin's more reserved personality very well, making their interactions seem natural.
FanFiction.net also has a lot of Lupin and Tonks fanfiction. Just use the search bar and type in their names. You might find some hidden gems there. Some authors are really dedicated to exploring their relationship in unique ways on this platform.
In many lupin tonks fanfictions, the theme of sacrifice is present. Lupin may sacrifice his own happiness for Tonks' safety or vice versa. Another common theme is the idea of redemption. Lupin, with his werewolf nature which is often seen as a 'flaw', finds redemption through Tonks' love. Also, the theme of friendship within their relationship is important. Their friends play a role in either supporting or challenging their relationship, which is often explored in these fanfictions.
Their contrasting personalities also make them an appealing pair. Snape is often seen as brooding and mysterious, while Lupin is more gentle and kind - hearted. Writers enjoy writing stories where these two personalities clash and then find common ground. For example, in many fanfictions, they start off hating each other but then realize they have more in common than they thought, like their loyalty to Dumbledore and their love for Hogwarts.
One possible scenario in this fanfiction could be that Teddy shows some unique magical abilities that remind Remus and Tonks of their own magical heritages. Maybe Teddy can transform in a way that combines both werewolf and metamorphmagus traits, which would be a really interesting plot point. It could also explore how Remus and Tonks, who had such a tragic end in the original story, get to experience some happy moments with their son Teddy through the magic of fanfiction.
It could lead to a whole new dynamic in the wizarding world. Maybe they'd have more adventures together and play a greater role in protecting it.
Also, it gives fans a chance to see different aspects of the 'Harry Potter' universe. Hermione is often associated with Harry and Ron, but in fanfiction with Remus, she gets to be in a different kind of relationship. It allows for new storylines and character developments that might not have been explored in the original books.
They are popular because Harry has a connection to Teddy through his father, Remus Lupin. Harry can act as a father figure to Teddy, and this relationship has a lot of potential for emotional depth. It's a way to explore the idea of family and mentorship in the wizarding world.
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.