One common theme is redemption. Many fanfictions explore how an OC can influence Leonard Snart's path towards redemption, especially considering his complex character in the original shows. For example, an OC might be the catalyst for him to turn away from his more villainous ways.
A common theme is the exploration of her relationships. Since Leonard Snart is a complex character, when written as female, her interactions with other characters, such as romantic relationships with teammates or rivalries, are often explored. For example, a relationship with Sara Lance could be a central theme.
Perhaps some writers are trying to explore extreme scenarios to show the character's resilience. But this is a very wrong approach as it involves abuse. It could also be that the fanfiction community has not been strict enough in policing such content, leading to some writers thinking it's okay to write such things. In a proper fanfiction environment, characters should be respected and not subjected to such inappropriate abuse.
In these fanfictions, the theme of discovery is prominent. Snart discovers the world of magic, which is completely new and alien to him. He discovers new abilities within himself as he interacts with the magic. Harry Potter and his friends also discover new ways of thinking from Snart. Another common theme is conflict resolution. There are often conflicts between the magical world's ways and Snart's more practical, technology - based solutions. Writers explore how they resolve these differences and work towards a common goal.
Sure. One great place to start is Archive of Our Own (AO3). Just search for 'Leonard Snart OC' on there, and you'll find a variety of fanfictions. Some popular ones often involve unique Original Characters (OCs) interacting with Leonard Snart in the world of the Flash or Legends of Tomorrow. For example, there are stories where an OC with special powers teams up with him on a heist.
One great place to start looking for female Leonard Snart fanfiction is Archive of Our Own (AO3). There are often many well - written stories there that feature this character as female. You can search using the character's name and relevant tags.
If there is such abuse in fanfiction, it's a very concerning issue. Fanfiction platforms should have strict rules against depicting abuse. Firstly, fans can report such works to the platform moderators. They can also start discussions within the fan community to raise awareness about the inappropriateness of such content.
One idea could be a time - travel related pregnancy. Maybe they get stuck in a time anomaly where Sara discovers she's pregnant, and Leonard has to figure out how to get them back to their own time while protecting her and the unborn child. It could involve some emotional moments as they both come to terms with this unexpected situation.
One interesting plot idea could be Snart using his cold - gun in the magical world of Harry Potter. Maybe he has to face off against a dark wizard and his cold - based technology gives him an unexpected advantage. Another could be a story where Snart is accidentally transported to Hogwarts and has to find a way back home while dealing with the magical chaos around him.