On the EoE DVD commentary track there is a reference made to a 'fan
theory' that Kaworu was somehow created from Ritsuko (IIRC they say
something about 'in the same way that Rei was created', so I assume
that they're talking about using Ritsu's DNA)

I realise that its probably just a bullshit theory that some crackpot
pulled out of thin air and proposed on a messageboard that Amanda
Winn-Lee happened to be reading, but does ANYONE have any clue
whatsoever as to where this idea came from and what it was based on?

I have watched the series in its entirity over the last couple of days
with this in mind and I cannot find a single piece of evidence that
even *hints* that Kaworu has any relationship with Ritsuko whatsoever.
-- 
Reverend David "PPV" Hawthorne - 
ICQ: 339380091

I rode a tank
Held a general's rank
When the blitzkrieg raged
And the bodies stank...

      '\
       _\______
      / HENTAI \========@
 ____|__________\_____
/ ___________________ \
\/ _===============_ \/
  "-===============-"