A Certain Magical Index: The Miracle of Endymion

Magicians target Arisa because she is believed to be a Saint, a person with immense magical power. Stiyl Magnus explains that Endymion can be turned into a magical device called a makeshift Tower of Babel if a Saint's power is harnessed. The Church of England witches and other magical factions see Arisa as either a valuable asset or a dangerous catalyst that could trigger war between magic and science.

Earlier, Kaori Kanzaki warns Toma that Arisa's presence could ignite conflict between magical and scientific factions.

Endymion is a massive space elevator being built in Academy City to ferry people into orbit without traditional spacecraft. However, Stiyl reveals it can function as a makeshift Tower of Babel, a grand magical device capable of catastrophic power if a Saint's abilities are channeled through it. Ladylee Tangleroad plans to use Arisa's singing to activate its magical potential, which would cause planetary catastrophe.

The narrative establishes early that Endymion represents a tech-magic frontier that concerns both scientific and magical sides.

Ladylee Tangleroad has suffered from a curse of immortality for centuries. Her grim ambition is to absorb Arisa's Saint-like power to break free from this endless existence. She commands the Orbit Portal Company and uses automatons to capture both Shutaura and Arisa to achieve this goal.

Ladylee's CEO position at Orbit Portal Company, the company building Endymion, establishes her control over the project.

Arisa reveals she cannot remember the past three years of her life. This memory gap is central to the mystery surrounding her identity. Later, Toma uses his Imagine Breaker on Shutaura to unlock the truth: Arisa's existence was created from Shutaura's desperate wish to save everyone on the crashing Orion plane, even at the cost of those closest to her.

Toma investigates Arisa's background with Motoharu Tsuchimikado and Kaori, who suspect she may bear Saint-like significance.

Shutaura Sequenzia is revealed to be the key to Arisa's existence. Three years ago, when the Spaceplane Orion crashed, Shutaura made a wish to save everyone on board. This wish somehow created Arisa as a result, linking their fates together. Though Shutaura initially appears as an antagonist pursuing Arisa, her true motivation stems from this buried memory and the weight of her past sacrifice.

Shutaura expresses skepticism about miracles yet acknowledges Arisa's unusual connection to events beyond ordinary memory.

Three years before the main story, the Spaceplane Orion crashed to Earth with 88 passengers aboard. Remarkably, there were no casualties, everyone survived, which was celebrated as a miracle. This event becomes significant later when the truth emerges about how Arisa came to exist through Shutaura's wish during that crisis.

The narrative frames this as a miraculous event that Shutaura later reflects on when her memory is unlocked.

Stiyl Magnus kidnaps Arisa because he believes her Saint-like power can be used to activate Endymion's magical potential as a Tower of Babel. While he operates from the magical side, his methods are aggressive and put Arisa in danger. However, he eventually joins forces with the protagonists during the climax to help stop the catastrophe.

Stiyl's initial attack on Arisa during her encounter with Toma and Index establishes his hostile intent.

Arisa and Shutaura join their voices in a duet while Index stabilizes the surrounding spellwork. Simultaneously, Mikoto Misaka, Accelerator, and Stiyl work to destabilize Endymion's construct from the ground, severing explosive bolts that would have released its destructive power. The combined effort strips Ladylee of her spell and merges Endymion into a harmonious system, averting catastrophe through reconciliation rather than pure force.

The narrative builds toward unity between science and magic as the solution throughout the conflict.

Shutaura leads the Black Crow Unit in initially attacking Arisa because she has lost her memory of the connection between them. Her antagonistic actions stem from being controlled by Ladylee's forces and her own confusion about Arisa's significance. Once her memory is unlocked by Toma's Imagine Breaker, she switches sides and works to protect Arisa.

Shutaura expresses doubt about miracles and acts with hostility toward Arisa until her memories are restored.

Toma Kamijou possesses Imagine Breaker, a mysterious ability in his right hand that can cancel any supernatural power. During the climax, he uses it on Shutaura, which unlocks her buried memory of the Orion crash and reveals the truth about Arisa's origin. This moment is crucial for resolving the conflict, as it transforms Shutaura from antagonist to ally.

Toma's ability is established early as a power that disrupts magical and esper abilities.