So I want to throw out there that I really like how every once in a while, you'll throw in a detail that reminds us: "Olga and Team A were not only people, but big parts of Taylor's life for two years."
I think I reread the bookcase paragraph like three times. It seems out of place at first, but then in context - it humanizes Olga Marie, adds the context that no, she and Taylor were actual friends even if they don't understand what that looked like, and establishes that Taylor is very much not as okay as she's projecting.
While I can't say I like what little I saw of her connections with Pepe (if only because he's my favorite Crypter and one of the best characters in FGO in my opinion), you do a good job of reminding the readers that Taylor has lived in this world, not just existed. People affected her and vice-versa.