There are also indications from the anime that Ryoko was aquanted 
with the Juraian royakl family before the attack.  Ayeka and Ryoko 
both have stories about their childhood encounters, none of which 
lead us to believe that Ryoko had criminal tendancies as a child.  it 
is possible that before that time she and Yosho may have been 
friends at some point.  but I think it would be an interesting story 
to write about what took place, between the time of Yosho's birth, 
till the Time that Ayeka came to Earth. 

You're confusing the OAV and TV storylines.  The stories about Aeka and
Ryouko as children are TV series.  Ryouko attacking Jurai and being imprisoned
in the cave is OAV series.