Yashoku had just been lying there, unaware of what exactly had happened.  When Alger gets close to him and right before he tires to wake him up Yashoku's body seems to act on its own.  He sits up and quickly draws a kunia and has it at Alger's throat.  He then blinks a couple of time before he sees that it is his roommate.  He lets out a little bit of laughter and pulls the kunia away.  "Sorry about that.  Habit."