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 MOMO Mizrahi.

After being abandoned they met Albedo Piazzolla and became his followers.

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