>>3142644She didn't kill her friends though she tells you she couldn't bring herself to truly delete them and brought them back once you try to delete her. People seem to forget that. She did some bad shit but never anything that was irreversible. She also only did it because there was no path for her to end up with you. She had no happy ending in the game and used the power given to try and achieve a happy ending for herself. The power may have gotten to her a bit but in the end she realizes what shes done and tries to fix everything for you. That's why she is best girl!