The real mother of Asuka Langley Sohryu. She suffered mental breakdown due to an accident during an experiment, and thereafter lived in a dream world until committing suicide. Her soul appears to have been used in the core of Eva-02.

Source: The End of Evangelion : Glossary contained within The End of Evangelion - Theatrical Program.


In The End of Evangelion Asuka finally realises that her mother had been with her all along and so proceeds to kick the crap out of the JSSDF and the Evangelion Mass-Production Models.