Ayase, you should REALLY consider getting some therapy. Making a character doll of your romantic rival just for the express purpose of gutting it with a knife is NOT something a sane woman does.
Shinhwalee said: I thought Ayase loved Kirino though. Why the sudden change?
Not quite. Ayase idolizes the image of Kirino in her head, which she believe is perfect. But idolizing is all the extent of how far that goes. If Ayase can be said to 'love' anyone, it'd have to be Kyousuke due to the latest volume in the Light Novel.
And some of those yandere scenes in the PSP games go a long way to aiding this as well, especially that Ayase bad end at the Kirino confrontation.