For one thing, Hamazura Shiage may not have been fighting against an external enemy here. The outside world may not have been registering to him at all while he fought against the death within him.

There was no reason to hesitate.

Accelerator only had to knock this guy aside and continue on to the engine room.

But just as he prepared to flip the switch on the side of his neck, his red eyes suddenly rolled to the side while his head remained motionless.

There was a loud boom just as he turned his attention elsewhere.

This must have been a surprise for Hamazura Shiage as well.

The corridor wall was torn apart in a surprise attack.

The person who made such an exciting appearance had long silver hair, brown skin, and bandages that were wrapped around her. Her bare foot had forced its way through the vector reflection barrier and kicked the #1 through the air. Her leg ended up twisted at an unnatural angle, but that did not keep her from laughing. The broken leg wriggled in a way no human leg ever should as the bone and joint were repaired. It happened so easily it was like seeing a balloon being inflated.

Hamazura slowly turned his eyes that way and moved his excessively sticky lips.

“Neph…?”

“That’s right. It’s everyone’s big sister, Nephthys. I’m going to fight the way I want to. And in this case, that definitely means fighting Accelerator instead of Hamazura Shiage. Don’t you agree, you chemical monster? Did you get that clog out of your chest?”

“You…!!”

“Yes, sorry about last time. I seem to have made your lovely slave girl cry an awful lot. I’m used to it since I was buried alive in the pyramids, but I do hate how you edgy guys think doing these things makes you a good person.”

She was so calm and chatty in front of the #1.

Magic Gods lived in their own little world.

Was that why she was not swallowed up by the white monster’s menacing aura?

She casually waved a hand Hamazura’s way.

“Now, he seem to have his own reasons for fighting as well, so I’m going to go enjoy myself over here. Oh, but this is not about which potential opponent would have been stronger. So go show off what a man you are. There is another fight with your name on it. Bye☆”

She did not say anything more to him. Instead, Magic God Nephthys licked her lips, crouched low, and tackled Accelerator just as he was getting up beyond the broken wall. The two of them crashed through the wall beyond that. Since they immediately fell straight down, that must have been the opera house which was tall enough to take up space on the first through third floors.
To Aru Majutsu no Index NT Volume 22 Chapter 4 Part 7
[...]
Everything about it was out of the ordinary from the very first move.

Even now, the woman with bandages wrapped around her brown skin was smiling thinly from close range.

“Neh heh☆”

This was Magic God Nephthys.

She was the largest and most powerful outside element here.

“Yes, this is fun, so much fun!! Ah ha ha! Eh heh heh! That’s right! What really matters is a chance to fight without having to worry about the consequences! Who needs all that angst!? All you need is that feeling of a solid punch or kick! You really are the kind of opponent I was looking for, Accelerator!!!!!!”

She had knocked Academy City’s #1 through a wall with an unarmed tackle. She had succeeded in a head-on attack against that Level 5 who could push back any vector with his reflection.

To Aru Majutsu no Index NT Volume 22 Chapter 4 Part 7