Saya Rohar

 was a technician aboard the Pride of Sheboygan. After an accident, a Memeovore escaped from containment and wiped a year's worth of memories of Saya and the rest of the surviving crew. When Saya learned from the Fifth Doctor that the crew had been capturing aliens for dissection, she willingly allowed her memory of this to be removed. (PROSE: Piecemeal)