Erases Touma's memories (though he undoes it)

For an instant – truly just an instant – her entire face grew beet red from the tip of her nose to the edge of her ears, but as a gorgeous and elegant lady, she did not do anything as unseemly as frantically reach out to hold her skirt down.

Instead, she sat up as slowly and silently as the shimmering heat, removed the TV remote from her temple, and pointed it at the boy standing a short distance away.

“Erase his memories!!” she shouted.

Her thumb moved and the pointy-haired head swayed. Mental Out never failed, so the memory of what color of flower garden was inside her skirt had been banished to eternal darkness.

Or so she thought.

“?”

The boy grew unsteady on his feet as if feeling faint, so he slowly shook his head while holding his head with his right hand.

“Hm? I get that you’re embarrassed, but why would you think that would erase someone’s memories?” he said with a dazed look on his face. “And I don’t know who you think’s interested in you and that flat chest of yours, but I won’t tell anyone, so just stand up already.”

“What!?”

He showed no sign of having lost the memory.

If anything, he was adding to it.

Just to be sure, she asked a question.

“I-incidentally, can you remind me what I’m wearing today?”

“What’s with that spider web pattern? Have you thought about something more your age? And does that even cover up the important bits?”

“Erase!!”

But no matter how many times she tried, nothing came of it. It was an endless spiral of memory erasure → dizziness → right hand to the head → confused look.

- New Testament Toaru Majutsu no Index Volume 11 Chapter 1 Part 2