Who is TAMMY from How to Live Safely in a Science Fictional Universe: A Novel and what is their importance?

TAMMY is the time capsule's on-board computer, and the narrator's main companion throughout the novel. Technically, she is one of two "personality skins" of the computer program, the other one being a male version Charles does not have, called TIM. Her face is pixilated, and she has the voice of a cartoon princess, Charles thinks.