Tokyo Ghoul The Black Goat's Egg Novels & Stories

Even though Alice had been on several missions with them, having hunted down phantom-beasts before, the girl had a faint heart towards gore and bloody images. Akasuki’s reason behind digging out the phantom-beast’s eyeballs was to show proof to the guild. One sure way to show evidence that one had defeated a phantom-beast was to pluck out their eyes. Once a phantom-beast had been defeated, the whites of their eyes darkened and became jet black while the irises remained a glowing luster of blood-red.