[Iron Maw]

Originally Posted by porous_shield

I've watched the series and read the manga but it feels like I'm missing something regarding the slasher, so if anyone could answer my question I'd appreciate it.

Spoiler for Slasher:

What exactly is Haruna Niekawa story? It seems like I remember reading or watching somethings, it was very brief, about her history but I haven't been able to find it. Anyway, my questions boils down to, who slashed Haruna Niekawa for her to get a daughter of saika? If Anri is Saika and she hasn't been going around merrily slashing people than how did Haruna end up possessed. Anyway it just feels like I'm missing something.

The anime kinda skirts this but,

Spoiler for Slasher:

It's implied that she was one of the victims for 5 years ago when Airi's mother was the true "Saika".