He spun around and saw Mugino Shizuri standing blood-covered on the other side of the bridge. Some of it was her blood, but some was from someone else. He recognized the thing that she was dragging in her right hand that looked a bit like an old rag.

“Frenda…”

Technically, it was only her upper half.

Wherever it had gone, her bottom half was gone and something dark red was dripping from the cross-section.

“That’s right. It seems she was afraid of School so she betrayed Item and then hid. So I had to do a little purging. …What are you doing? You don’t need any purging, do you?”

[...]

“Go!!” yelled Hamazura cutting her off. “I know you can’t ignore a murder case, but she’s well beyond that level! I can’t get into the details, but Frenda was fairly skilled herself. That woman is someone who could kill her in one blow! That’s why I’m telling you to take Takitsubo and go!!”

Toaru Majutsu no Index vol.15 ch.4 pt.6