[Guido]

The school scene was tearjerking for me.

Spoiler:

I'm surprised how Satoko was completely defenseless and a cry-baby because of their abusive uncle and aunt, one year before Keiichi arrived.

Eventually, I will learn how Satoko became who she is in Onikakushi-hen, Watanagashi-hen, and Tatarigoroshi-hen, once Satoshi's impending doom arrives.

Shion desiring to eliminate the source of Satoshi's misery which is primarily Satoko for Meakashi-hen, parallels Keiichi's murderous wish to kill the one who was bringing pain and despair to Satoko, which was her uncle for Tatarigoroshi-hen.

But I find Shion's rage and hell bent misplaced toward Satoko, because she hasn't done anything to her. Just because Shion fell attracted toward Satoshi and pitying at heart his current predicament does not give her the right to pour her fire on Satoko; I applaud and praise Rika-chan for her defensive stance to protect Satoko and arguing reason on Shion.

It would have been more intense if Shion started to slap Satoko on the cheeks or even going as far slapping her on the butt. However, grabbing her by the forehead and throwing her as a rag doll was just brutal.

How come Shion exerted that supernatural strength? Was it the product of her going into Oyashiro-mode?

Was Shion's psychosis just a regular one? or maybe her Oyashiro-mode awakening out of jealousy?
Well, we have plenty of time to see the close shot of Shion's face, and since her eyes turned cat-like then that means Oyashiro-mode, at least looks to me.