MOMO Mizrahi

 MOMO is an artificial life form known as a Realian.  She is the prototype of the 100 series of Realians.  She was created by scientist Joachim Mizrahi as a vessel for the Y-Data, a highly sought piece of information in the Xenosaga universe.  In Episode 1 MOMO is captured by Margulis and imprisoned in preparation to extract the Y-Data from her.  She is subsequently rescued by Ziggy and eventually meets up with Shion and the rest of the Xenosaga protagonists.  She is re-captured by Albedo who attempts to extract the Y-Data from her, he is only partially successful in his attempt.   MOMO is once again rescued and reunited with her new friends and joins them in their quest.