One common theme is power struggle. Abaddon is a powerful demon, so many fanfictions explore her battles for power, either against other demons or the Winchesters. Another theme is her backstory. Writers often delve into her past to give more depth to her character.
Love and attraction can be themes as well. This could be in the form of an unrequited love for a character, or a forbidden love due to her demonic nature. Her journey of self - discovery within the framework of the Supernatural universe is also a theme that pops up in some fanfictions. Fanwriters like to explore what makes Abaddon tick and how she views herself in the grand scheme of things.
One common theme is the struggle between good and evil. Since Abaddon is a demon, her daughter often has to deal with the pull of her demonic heritage while also having the potential for good. For example, in many fanfics, the daughter may be tempted to follow in her mother's footsteps but then has to fight against that urge.
In fanfiction about Henry Abaddon's Daughter in Supernatural, a frequent theme is identity. She has to figure out who she is in relation to her father. Family drama is also common. Maybe she has a conflicted relationship with other family members who are also part of the Supernatural world. And love can be a theme too. She could fall in love with a character from the show, which would add an interesting dynamic to the story.
One key element is the power dynamic. Henry, being a Winchester, has his own set of skills and knowledge, while Abaddon is a powerful demon. Their interactions often revolve around who has the upper hand at any given moment.
There's also a fanfic titled 'Abaddon's Daughter: Redemption'. In this one, the daughter of Abaddon tries to break free from her mother's dark legacy. It has some really interesting plot twists and the relationship between the main character and the other Supernatural characters like Sam and Dean is well - developed. It's a great read if you're into character - driven stories.
I'm not sure specifically which 'Henry Abaddon's Daughter' fanfiction in Supernatural you're referring to. There could be many different takes on this in the fanfiction world. Some might focus on her relationship with the main characters in the show, like how she might interact with Sam and Dean. Others could explore her backstory, her powers if she has any, and how she fits into the Supernatural universe.
There's also 'Henry and Abaddon: An Unlikely Alliance'. In this fanfic, it shows how Henry and Abaddon might have to team up against a common enemy in the Supernatural universe. It's full of action and some great character development for both of them.
In 'supernatural fanfiction', a frequent theme is the alternate universes. Writers like to imagine different versions of the 'Supernatural' world, where things happened differently. Romance is also a big theme, whether it's between the main characters or new characters introduced in the fanfic. Also, the origin stories of the supernatural beings are often explored, giving more background and depth to the existing lore.
One common theme is forbidden love. Maybe a vampire falling in love with a werewolf in the academy, which goes against the norms of their species. Another is the underdog rising to power. A student who is initially underestimated but then discovers some great power within themselves.
One common theme is redemption. Since Adam had a rather rough deal in the show, a lot of fanfictions explore his journey towards redemption. Another is family. How he fits into the Winchester family dynamic, whether it's forming a bond with Sam and Dean or finding his place in the larger family of hunters.
One common theme is redemption. Cassiel has made some mistakes in the show, and in fanfictions, writers often explore his journey to redeem himself. For example, he might try to make up for his actions by helping Sam and Dean in a more selfless way.