Talk:Nuruko/@comment-30914979-20170507101426/@comment-25707465-20170507115810

Gotta find back the exact line, but it was explicitly stated that Karen was Sonya's mother.

Which doesn't make it a certainty. The part with a mask however is likely about the Mazuda/Mainyu split.

Nuruko however is the result of an experiment to recreate apoptosis in a tartarus, and Hild was created in the future and put in stasis ->no interaction possible before Luka awakened her.