I have to. She's one of my favorites, too. ;.; If it makes you feel any better, Mewtwo doesn't let her suffer. Besides, The Corruption turns her from a childish cat, into a RPG Class ripping off user, and then into a Yangire (Sort of like a Yandere, but while being just as insane, they doesn't possess over something) by the end. You will hate Giratina and Deoxys by the end of this, if you like Mew.
Either she dies, or goes even more insane then she would be, and since at that point, she wouldn't even know that she'd be trying to make rocks bleed like humans, you know it'd just... be horrible. I couldn't do that.