Before trans. and with my (very) limited knowledge: Looks like we're going to see Flandre soon if Koa doesn't confess she hid (or destroyed) the book.

Before trans: Seems this is going to go really bad, now Patchy is shaking.
Bad omen.

Bad omen alright. You don't take anything away from the little sister!

Even though the facial expressions don't really change and the eyes are just little black dots... I can still see the complete and utter dread in Patchy's eyes.

koa eyes say it all in the second panel

I'm looking forward to seeing Flan in this style.