The Kirschwassers, or formally the 99-Series Observational Realians, were a series of artificial humanoids in the Xenosaga series. They all had the appearance of a young girl with dark skin, white hair, and yellow or brown eyes.
They were the predecessor to the 100-Series Realians and were involved in the development and creation of M.O.M.O..
After being abandoned they met Albedo Piazzolla and became his followers.