What is the most annoying thing that has ever happened to you in Fire Emblem?
Having someone killed after almost beating a chapter. It has happened to me once in Paralogue 2 from Awakening, which was by the far the most frustrating paralogue I've ever played if you want to keep Anna alive, and I'm sure everyone else who played it can agree.
yeah in my most recent playthrough i failed to save anna too which was pretty annoying but i didnt mind much because she was still alive and all and i probably missed just one item. also it didnt affect recruiting anna since she joined at paralogue 4 wheher or not you saved the other anna.