Rukia read over Allen's note, nodding a couple times. Quickly - writing took so much longer than speaking! - she wrote:

Yes, they do make patients attack each other, but that's only every other night. Tonight will be one of those nights. Last night was when they experiment on patients. So it couldn't have been your friend under the control of the Institute.

The other girl? You mean another shinigami?

I think my best piece of advice right now is to make sure your friend knows that you care about her. I'm sure she needs your support right now.

Rukia knew from her own experience how much it hurt when a loved one was gone forever, and you never told them how you felt. When Kaien had died in her arms, she had been unable to say anything but his name. She still regretted not... thanking him, or saying something to let him know how much he had done for her.