Brain bug is the controller of bugs. She is defenseless but she can emit high pitch screaming noise capable of bursting blood vessels in human heads at a short distance. Chariot Bugs always carry her as transport since she can't walk nor move. To steal a person's knowledge and memories, she goes through the use of a sharp proboscis that protruded from her mouth. This highly specialized mouth is designed to break through the skull of a sentient being and penetrate into the brain itself.