Hellsing Ultimate - Ending Explained

The series concludes with several major revelations: First, Walter C. Dornez is revealed to have betrayed Hellsing decades ago to undergo a vampirization process that would allow him to fight Alucard in his prime. Second, Alucard’s 'Level 0' release is actually a trap set by The Major. By consuming millions of souls, Alucard became vulnerable to Schrodinger. When Alucard absorbed the paradoxical boy, he lost his sense of self among the millions of other souls, causing him to vanish from reality. He spent 30 years 'killing' every soul within him until only he and Schrodinger remained, allowing him to regain his individuality and return to the physical world, now possessing Schrodinger's ability to exist anywhere he perceives himself.

Some critics interpret the series as a critique of institutions, where the only 'good' characters are the outcasts (mercenaries and monsters) while the established powers (Vatican, Nazis, Government) are depicted as irredeemably corrupt or insane. Another reading suggests that Alucard's return in the finale as an 'everywhere and nowhere' entity represents a transcendence of duality; he is no longer just a monster or a servant, but a fundamental part of the world's fabric, reflecting a Zen-like state of being after purging the millions of souls within him.