Last Episode honestly doesn’t seem like it has much to write about, initially. It’s a moving but short scene, payoff rather than setup, building on what we know without changing or adding too much.
It can’t, of course. As an addition to Fate/Stay Night’s Realta Nua re-release, Last Episode is in the rather awkward position of being an ending to a story that ended well before it was written. But then again, FSN has no shortage of endings – how much could another one hurt?
There’s an interview quote that talks about Takeuchi encouraging Nasu to write Last Episode – Nasu originally didn’t want to, but was eventually convinced to try and come up with something tha