Yes, there are. In some fanfictions, the characters eventually understand each other better. They might have a heart - to - heart conversation where they realize that their differences were based on misunderstandings. For instance, Hermione might explain her actions and intentions more clearly to Molly, and Molly might come to appreciate Hermione's qualities.
There could be Molly's owner or owners. They are likely important characters as they have a relationship with Molly. Maybe there are also other animals in the neighborhood like cats or other dogs that play a role in the story.
I'm not entirely sure specifically what 'Molly's Game' is about without more context. It could be the story of a person named Molly and some kind of game she is involved in, perhaps a personal game, a sport - related game, or a game in a more abstract sense like a game of life situation.
Molly's Game is indeed a true story. It's inspired by the events that happened to Molly Bloom herself. The film stays quite close to the actual events, although there might be some minor creative adjustments for cinematic purposes.