One thing that might make it unique could be its character design. If Ingrid has a distinct look or personality, that would set it apart. For example, if she has a very unusual weapon or power that is central to the story.
Well, I'm not extremely familiar with it, but generally, a visual novel like 'Makai Kishi Ingrid' likely has an engaging story. It might involve characters in a unique setting, perhaps a fantasy world given the 'Makai' which could mean 'demon world' in Japanese. The character Ingrid is probably central to the plot, and players/readers would follow her adventures through different scenarios presented in the visual novel format.
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.
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.
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.