The sixth arc of A Certain Magical Index, consisting of volume 6 of the light novels, chapters 34-44 of the manga, and episodes 21-24 of the anime.
- A Day in the Limelight: For Index and Hyouka.
- Arc Villain: Sherry Cromwell.
- Bottomless Magazines: While the Anti-Skills are shown reloading a few times, they fire a lot more bullets than their guns can hold.
- Chekhov's Classroom: What Index said about secondary spells came in handy for Touma.
- Clingy Jealous Girl: Index and Mikoto, the two most important girls in Touma's life, finally meet. It's not pretty. Kuroko also does not like Touma because of Mikoto's interest in him.
- Golem: Sherry's creation Ellis.
- Ignorant of Their Own Ignorance/Locked Out of the Loop: This arc fully demonstrates that pretty much nobody in Academy City is aware of the Magic Side, to the point that they assume Sherry must be an esper after seeing her powers.
- Marshmallow Hell: Hyouka inflicts this on Sphynx without noticing.
- Shout-Out: Komoe jokingly imitates the iconic scene from Dragon Ball Z where Vegeta yells, "It's over 9,000!" (though she says 70,000 instead) while talking about if someone could detect AIM.
- Skewed Priorities: Index and Mikoto think their love lives are more important than a terrorist attack.
- Tomato in the Mirror: Hyouka didn't know she wasn't human.
- The Unreveal: Komoe won't explain how she can drive.
- Unwitting Pawn: Aleister claims every heroic act Touma does plays into his hands. He's also been keeping tabs on him since he was a small child.
- We Have Become Complacent: Sherry claims this about both the Science and Magic Sides.
- What Measure Is a Non-Human?: Even though Hyouka is clearly a sentient being, Sherry dismisses her as a creature similar to her golem. Hyouka even starts to believe it. Fortunately, Touma and Index don't feel the same way.
- Your Size May Vary: Mikoto and Kuroko are the same height in a few scenes, when Kuroko is normally a head shorter than her.
