Well, in a Destiny 2 Ana Bray x reader fanfic, you can expect a lot of action -packed scenes set within the Destiny 2 universe. It might start with the reader character meeting Ana Bray in some dangerous mission area. Maybe they'll team up to fight off some Fallen or Hive enemies. The relationship between the reader and Ana could be one of mutual respect at first, as they both have their own skills and knowledge of the game's world.
Often, these types of fanfics focus on character development. The reader character will grow and change throughout the story. They might start as a novice in the Destiny 2 world but become a more skilled and confident fighter with Ana's help. And Ana herself might also change, perhaps becoming more open and trusting towards the reader. The fanfic could also include elements of romance, where the two characters develop feelings for each other over time, but it doesn't have to be strictly romantic. It could also be a story of friendship and camaraderie.
In such a fanfic, there could be a lot of lore exploration. Ana Bray has a rich backstory in Destiny 2, and the fanfic could delve into that. For example, it could show how Ana's past experiences with the Bray family and her own journey as an Exo affect her interactions with the reader. There might also be some emotional moments, like when Ana shares her memories or when the reader has to protect Ana from a powerful enemy. It's all about creating a unique story within the framework of the Destiny 2 world.