Good page cut. Especially with the, "I'm so happy..." line.
Motivations in this manga are... arbitrary. For all the backstory, it's still just someone with a destructive personality.
"I'm jealous of the people who got knocked senseless."
That's an opinion.
"Drag those cowardly teachers back here and make them help!"
Wait... There are
teachers?
Attacking from sheathed is slower than from a high, offensive stance. Well, in real life.