wait what about the Azula/Mai choice? Does it affect future scenes?In the books, no. Each book is independent as far as I can tell except some minor dialogue changes and the Azula/Mai choice from book 2 love. For the epilogue you are for sure locked out of the Ikki content without enabling it in book 4 first (There's an option with Korra on the ice just before the cave scene near the start of book 4 love). You might also be locked out of the Pema content, I'm not sure on that one though.