Ryousuke was sure that Yama could do it. She was the immortal queen who ruled over life and death. For her, there was no such thing as dying. And as someone who couldn’t die, Yogiri’s counterattack would mean nothing, which in turn meant he was just like an ordinary human to her. Getting rid of him would be child’s play.

“Ha, haha! This is the end! Yama has no concept of death! There’s no way you can —”

“Die.”

Yama immediately went limp. Falling into a puddle of blackness, she quickly dispersed, leaving nothing behind.

“You know, all the people who’ve said they can’t die, or that they’re already dead, or that they have no concept of death...all of them have died so far.”

-Volume 4 pages 44 and 45