There are some great 'Poison Ivy x Batgirl' fanfics out there. You can start by looking on fanfiction platforms like Archive of Our Own. Some of them explore the complex relationship between the two characters, from their different ideologies to the potential for an unlikely friendship or more. It really depends on what kind of story you're interested in, whether it's action - packed adventures where they team up, or more character - driven pieces that focus on their emotional connection.
For Poison Ivy, her personality can be developed by exploring her love for plants further. In a fanfic, she could be shown as having a deeper connection to the plant world, like being able to communicate with plants on a more profound level. This could influence her interactions with Batgirl. For instance, she might try to make Batgirl understand this connection.
The themes usually revolve around their relationship dynamics. There's the theme of power struggle as they both have their own kind of power. Poison Ivy with her control over plants and Batgirl with her combat skills and detective abilities. Additionally, themes of trust and betrayal can be found in many of these fanfics. Sometimes they start off not trusting each other but then gradually build that trust as the story progresses. And of course, the theme of female empowerment as they are both strong female characters.
A third possible storyline could be a story set in an alternate universe where Poison Ivy and Batgirl are friends from the start. They could use their combined skills, Ivy's knowledge of plants and Batgirl's combat and detective skills, to solve mysteries in Gotham that are related to strange plant - related phenomena or crimes against the environment.
In some fanfics, Poison Ivy might be portrayed as using her plant - controlling abilities in unique ways when lemon is involved. Maybe she could use lemon - scented plants to attract or repel certain characters. It really depends on the creativity of the fanfic writer.
The popularity might be due to the unique dynamic between Harley Quinn and Poison Ivy. Their relationship is complex and full of contrasts, which makes for an interesting read in fanfics. The 'lemon' aspect, which often implies some level of sexual or romantic tension, adds an extra layer of intrigue for many readers.
There's also 'The Ivy - Bat Alliance' fanfic. It starts with an unlikely alliance between Batman and Poison Ivy against a common enemy in Gotham. As they work together, their relationship blossoms in unexpected ways. The writer creates a vivid Gotham setting and the dialogue between the two characters is both sharp and full of unspoken emotions.
I found 'Poison Ivy and Robin: An Unlikely Bond' to be quite good. It starts with their initial encounters which are filled with tension. As the story progresses, you see them slowly understand each other more. The writer has used great descriptions to bring out the personalities of both characters in the context of their relationship.
First, understand the characters well. Batman is brooding and has a strong sense of justice. Poison Ivy is passionate about plants and the environment and has a more chaotic moral compass. You need to keep these traits in mind when writing their interactions. For example, in a lemon fanfic, their physical interactions should still be in line with their personalities.
One possible storyline could be that Poison Ivy discovers a new type of lemon - infused plant that gives her enhanced powers. This new power could then lead her on a journey to protect it from villains who want to use it for their own evil purposes.