Siva said:
@Touka: I think you are missing 2 importance points in there.
First, the target warriors MUST use yoki or has their yoki turns on, which is the case here since Teresa did not fight with her yoki on(IIRC)
Second, the stronger your hatred is the more the effect of the ability has on you. In this case, Teresa did not possess any hatred toward anyone not even the Org.
Actually Teresa was forced to fight with her youki in the end and it was made clear the organization knew Priscilla would become stronger than Teresa so I think they anticipated as much. I didn't really understand why hating the organization makes number 10s ability more effective though. Rubel said that number 10 can control a persons deep thoughts, so obviously she could bring up some bad memories or confuse someone into thinking a dead person is alive to put them emotionally off balance (like we saw in this chapter), but how does hating the organization amplify this? Maybe I just missed something.