- "I've located a vault, and I think I'm going to get proof of a previous civilization there."
- ―Cadet Chelli Aphra
Located below ground on the world Boothi XII was a vault. During the early years of the Age of the Empire, Cadet Chelli Aphra of the University of Bar'leth undertook an archaeological expedition to the Boothi XII vault in the hopes of discovering evidence of a civilization or precursor race that inhabited the planet millennia before. Aphra, however, found nothing of note.
- Doctor Aphra 1: Aphra, Part I (First appearance) (Appears in flashback(s))
- Doctor Aphra 2: Aphra, Part II (Mentioned only)