"Sis... why..? Why are you doing this?"
Yui could not answer. She had not anticipated her own sister showing up at the scene. Should she just kill her? Was Ui here to help out? Yes, that must be it. Ui always helps out her big sister when she's needed. She is so dependable.
"I knew you'd come help me, Ui. Come on. There is probably another SWAT team on their way. We have to get out of here."
"Yui... please. You can't do this!"
"I've already done it."
Yui replies, gesturing at the mound of corpses piled at the foot of the chair where Azusa's corpse was resting. "Are you INSANE!?!?"
"Maybe I am." Replied Yui. "Aren't we all?"
Yui began pacing back and forth across the room.
"It's funny... all these years, I've been acting like the immature big sister, spoiled, demanding, and seemingly lazy... but as it appears, I am ACTUALLY CRAZY!!!"
At this point she let out a loud bout of laughter, with tears streaming down her cheeks, out of nowhere. The magnitude of the situation had finally reached Yui's mind. "You're lost, Yui. There is nothing I can do. I'm going to end this now."
"Huh?"
-BANG-
Yui was shocked. Her lung was just pierced by a bullet, fired from a gun that Ui was twirling in her finger.
"The Colt single action army. The finest handgun ever made." Ui said, continually flipping and twirling the revolver.
"Six bullets. More than enough to kill anything that moves."
Five more shots resounded throughout the hall, and less than a minute later, Ui could be seen walking from the scene, down the stairs, never to ascend again, still twirling her revolver.