MezzoDragon said: What the heck happened? I get Sakuya was getting her revenge, but that's all I get.
Note the hairstyle changes. Basically:
"My haircut is grim and austere, and therefore so am I!" → "Screw that noise, babe, you're a recurring STG player character now! Let's jive!" → "I now vaguely resemble a flapper girl!" → "CURSE YOU YOU REBELLIOUS CHILD" → "Woe is me and my lone tear of sadness/bruise from being poked in the eye in the last panel!" → "Riiiidiiii, Pagliaaaachioooo!" "wat"