The Galatea was an Ultra-owned lighthugger which was present in the vicinity of Yellowstone both in 2460 and 2543. After Ana Khouri lied about infiltrating the Nostalgia for Infinity for another Ultra crew -- to prevent Ilia Volyova from discovering her true allegiance to The Mademoiselle -- the latter discovered that the Galatea was the only possible candidate as the Ultra culprit.