I don't think we can assume she's a villain. Just because she has 'another story' doesn't mean it's a story of villainy. She could be a bystander who gets involved in the events in Gotham in a positive way, like helping Batman or the police in some way.
One common theme is the development of a romantic relationship between them. Given their different roles in the Resident Evil universe, seeing how they overcome obstacles to be together is a popular plot. Another theme could be them working together on a mission, with a focus on their growing trust and mutual respect.
The Unforgettable Ingrid Bergman was an article describing the French actress Ingrid Bergman. It mainly introduced her beauty, talent, and noble temperament, as well as her importance as one of the representatives of French culture. The article also mentioned her relationship with the famous French director, Nolan, and her influence and achievements in the film industry.
Their relationship would likely become more protective. Gregorio would be constantly worried about Ingrid and the baby. He might start taking on more dangerous tasks himself to keep her out of harm's way. Ingrid, on the other hand, might feel a bit smothered at times but also appreciate his concern. They would also have to communicate more about their future plans, both as spies and as parents.
Ingrid faced a series of challenges and unexpected events. But it's hard to give a detailed account without knowing more specific details of your question.
Well, FanFiction.net could be a place to look. Just type in 'Leon x Hunnigan' in the search bar, and it'll show you relevant stories. However, the quality can vary a great deal. Some might be really well - written with great character development, while others might not be as good. You'll have to read through the summaries and reviews to find the ones that interest you.
I don't know who created the 'Ingrid Never Ending Story'. There could be an individual writer, perhaps an amateur or a professional, who came up with this concept.
I'm not sure specifically what 'Ingrid Never Ending Story' is about as it could be a very unique or personal creation. It might be a story that features a character named Ingrid and has an ongoing, perhaps fantastical or complex plot that seems to have no end.