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.
The theme of Molly's Story could be about self-discovery and personal growth. It might focus on Molly's journey to understand herself and her place in the world.