Kiritsugu Emiya is the central Master of Fate/Zero, a freelance assassin nicknamed the Magus Killer for his cold efficiency in eliminating mages. Hired by the Einzbern family and bound by marriage to Irisviel von Einzbern, he enters the Fourth Holy Grail War determined to seize the omnipotent wish and use it to bring lasting peace to the world, no matter how many lives that goal demands of him.
His arc is defined by an agonising contradiction. Kiritsugu summons Saber, a king who embodies honour and open battle, yet he fights through sabotage, sniping, and collateral sacrifice, refusing to share his plans with her. Flashbacks reveal a childhood shattered by the death of his first love and the mentor figures of his youth, forging his belief that saving the many justifies destroying the few.
By the war's climax Kiritsugu is forced to confront the true nature of the corrupted Grail, a confrontation that demands the most unbearable choice of his life and leaves him a hollow, broken man. His final act of compassion, rescuing a single orphaned boy from the ashes of the war, sets in motion the entire story of Fate/stay night.
Kiritsugu Emiya is one of the central figures in Fate/Zero, a anime/action/fantasy/dark-fantasy series that aired on Type-Moon and ufotable from 2011-2012. Within the narrative of Fate/Zero, Kiritsugu Emiya serves as a pivotal character whose decisions and relationships drive key story arcs throughout 2011-2012 (seasons 1-2). The character's journey has been central to many of the show's most memorable and discussed moments.
Portrayed by Rikiya Koyama, Kiritsugu Emiya has become one of the most recognizable characters in modern television. Rikiya Koyama's performance brings nuance and depth to the role, creating a character that resonates with audiences on both intellectual and emotional levels. The casting of Rikiya Koyama has been widely praised by both critics and fans as essential to the character's impact and the show's success.
Explore More on TVCeleb
TVCeleb.com is the internet's most comprehensive resource for television character fandom, covering 515 acclaimed TV series with 1622 detailed character profiles and 1324 actor biographies. Our coverage spans 106 genres across 127 networks and streaming platforms, with content organized to help fans discover, explore, and engage with television from every angle.
Browse our collection by genre to find shows in your preferred category, by network to see what's available on your streaming platform, by decade to explore different eras of television history, or by curated lists that group characters by archetype and achievement. Each show page features expanded synopses, production details, and video content, while character pages include detailed arc analysis, key episodes, quotes, trivia, and fan ecosystem mapping.
Every character on TVCeleb is scored using our proprietary Fan Heat Index, which measures engagement, social activity, meme velocity, fan art density, and fandom longevity on a scale of 0 to 100. This data-driven approach provides objective insight into which characters have inspired the most passionate and active fan communities. Use the search page to find any character, show, or actor instantly, or start browsing from our homepage to discover what's trending in television fandom today.
? Frequently Asked Questions
Kiritsugu views Saber's chivalric code as a tactical liability. He fights with assassination and sabotage to win at any cost, so he deliberately keeps her in the dark and often acts through his wife Irisviel instead, which fuels the deep friction between them.
Kiritsugu is the adoptive father of Shirou Emiya, the protagonist of Fate/stay night. The boy he saves at the end of Fate/Zero is Shirou, making this prequel the origin of the later story.
