When thinking about his own difficult past as a werewolf. Memories of being ostracized and feared by others could resurface. He might cry as he reflects on all the pain and loneliness he had to endure throughout his life.
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.
One great fem Harry Potter and Remus Lupin fanfiction is 'A Different Path'. It explores an alternate universe where Harry is female and her relationship with Remus develops in a very interesting way. It delves deep into their characters and how they interact in a world full of magic and mystery.
One interesting fanfiction idea could be that Snape discovers a hidden Horcrux that Lupin unknowingly has in his possession. Harry Potter then has to figure out how to destroy it without harming Lupin. This would add a whole new layer of drama and mystery to the existing lore of the Harry Potter world.
In such a fanfiction, perhaps Harry would grow up with a more nurturing and understanding environment. Lupin could teach Harry about the wizarding world in a very different way than the Dursleys. He'd likely introduce Harry to magic earlier and help him better understand his parents' legacy.
Many 'Harry Potter Remus Lupin fanfiction' deal with his sense of isolation. Despite having friends, he often feels alone because of his condition. Writers explore how he overcomes this feeling or succumbs to it. His relationship with the wizarding community at large, whether they accept or reject him due to his lycanthropy, is also a common theme.
One great fanfiction could be about Remus Lupin teaching Harry Potter some advanced defensive magic techniques, with Sirius Black popping in now and then to offer his unique insights. It might explore how Remus's calm and methodical approach contrasts with Sirius's more impulsive nature, all while guiding Harry on his journey to become a better wizard.
There are also authors who are really good at character development in their fanfictions. Take 'TonksTales' for example. They create stories where Lupin and Tonks' characters are very true to the original books but also have new and interesting facets added. They might explore Lupin's insecurities in a new light or show Tonks' Metamorphmagus abilities in unique situations. Another great author could be 'RemusAndNymphadora' who writes stories that are often set in different time periods of the 'Harry Potter' world related to Lupin and Tonks.
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.
Well, perhaps in the fanfiction, Harry adopts Teddy Lupin right after the Battle of Hogwarts. Teddy is just a baby then. Harry, who has lost so many people, sees Teddy as a new beginning. He might face challenges from the wizarding community as some may question his ability to raise Teddy. But Harry, with the help of his friends like Hermione and Ron, overcomes these difficulties and Teddy grows up to be a strong and kind wizard.
One interesting fanfiction could be about Tonks and Lupin's relationship during the early days of their acquaintance at the Order of the Phoenix. It might explore how they first noticed each other's unique qualities, like Tonks' Metamorphmagus abilities catching Lupin's attention.