TV-Series
Description
Saiji Tatemiya acts as Substitute Supreme Pontiff of the Amakusa-Style Remix of Church, temporarily leading the sect after Kanzaki Kaori steps aside to shield them from dangers tied to her Saint status. He relinquishes authority once she resumes leadership, steadfastly upholding her principles of aiding the forsaken. Under his guidance, the Amakusa undertake missions reflecting these values, from extracting Orsola Aquinas from Roman Catholic custody to bolstering allies like Kamijou Touma in confrontations.

Standing tall and lean with beetle-shell-black tousled hair, Saiji’s 25-year-old frame sports an oversized shirt marked by a crimson diagonal cross—a nod to Kanzaki and Anglican solidarity—paired with basketball shoes trailing meter-long laces and a rope necklace strung with tiny fans. Each garment doubles as a magical tool, embodying the Amakusa’s practice of weaving spells through mundane items.

His demeanor blends approachability with sharp pragmatism. He fiercely shields allies, confronting foes solo to liberate captured comrades and retaliating against threats to their safety. He rejects despondency, prodding Itsuwa to address her unresolved ties to Touma and steadying her after emotional collapses. In combat, his confident sarcasm gives way to razor focus during crises like the Church of Orsola clash.

Saiji wields Amakusa magic fusing Christian, Buddhist, and Shinto rites, deploying flame-dampening barriers, impact-resistant shields, and agility-boosting spells. His signature 180-centimeter Flamberge, crafted from non-metallic composites to evade Imagine Breaker’s nullification, complements collaborative techniques like Body Enhancement Magic—a synchronized spell requiring physical contact among Amakusa members to unlock hypersonic combat speeds.

Strategically, he masterminds Orsola’s extraction by infiltrating Catholic ranks, partners with Touma and Stiyl Magnus to thwart Agnese Sanctis’s assault, and engineers fire ships to sink the Queen’s Fleet. Later, he liberates Agnese’s captured unit, aids Touma against Acqua of the Back, and navigates interpersonal tensions—teasing Itsuwa over her crush on Touma or intercepting the Knight Leader’s pursuit of Kanzaki.

Though older than Kanzaki, Saiji unwaveringly defers to her leadership, having likely observed the events prompting her departure three years prior. His interim rule stemmed from the sect’s resolve to overcome past fragility while honoring her teachings. This tactical acuity surfaces in his use of Stiyl’s runes to summon Innocentius or stealth missions employing wooden submersibles.

After the Amakusa merge with the Anglican Church, he relocates to London’s Japantown, persisting as a steadfast ally in ensuing conflicts. His arc traces a shift from provisional leader to loyal enforcer of Kanzaki’s vision, cementing the Amakusa’s legacy as defenders of the oppressed.