Melissa

Melissa is an artificial intelligence construct created from Yasmine Zaman's brain after Yasmine "washed out" of the Spartan-II training program at age fourteen, dying during augmentation. Melissa became the AI of the Prowler UNSC Apocalypso.
When the Deep-Space Artifact recovered by the Apocalypso created a slipspace explosion on the ship's return to Earth, she was blown apart, with some parts being transmitted to Earth of the present and others being thrown back in time to the Earth of the early 21st century.