Watching people play V'ehxness route made me realize something. Almost everyone assumes Hiruko is the one to stab Takumi and V'ehxness at the end., until it is shown Tsubasa did it.
This made me realize that, despite her harsh tone and sometimes antagonistic nature toward the others, Hiruko never directly kills anyone in the SDU. Even in the cases when they've been taken over by G'ie, like in Takumi and Kako's cases, she actively avoids killing them.
Interesting trend that I'm surprised all the writers adhere by (maybe unintentionally, or expressively told to by Uchikoshi)