The difference between Season 1 and Season 2 is the difference between watching a war and watching it consume everyone you thought had principles. Kiritsugu stops being a hero the moment he realizes what winning actually costs. By the finale, there are no masters left who haven't made a choice that destroys them, and the show doesn't offer you the mercy of believing any of them were wrong to make it.
Kiritsugu Emiya's careful plans fracture as the Holy Grail War enters its final, desperate phase. With fewer Masters and Servants left standing, an external threat forces temporary alliances between natural enemies, but trust dissolves the moment the danger passes. Each participant reveals how far they'll actually go to claim victory, stripping away pretense and exposing the brutal calculations beneath their noble claims. The real conflict deepens between Kiritsugu and Saber. She fights for honor and righteous combat. He fights to win, period, and increasingly questions whether a Servant bound to outdated ideals can help him secure the Grail. Meanwhile, Kirei Kotomine drifts toward a strange connection with another Servant, sensing in them something that might finally answer his search for meaning and purpose. As the war's endgame unfolds, the question shifts from who will win to what winning actually costs. Every remaining participant learns that victory in the Holy Grail War demands sacrifice beyond what they imagined possible.