[Aeshma]

Originally Posted by ZODDGUTS

Got a couple of theories about Satellizer she may be

Spoiler for theory:

A clone of Aoi's sister with her age accelerated to the current age because that's when she's at her prime and now she's aging normally or two her DNA genetic stuff was manipulated to be close to Aoi's sister somehow making her feel some sort of a connection to Aoi. Either way it deals with genetic stuff and the school organization deals with genetics...

Spoiler:

In that case I think Aoi would have realized that she looks exactly like his sister, and not just from behind.

Besides, it´s less creepier that way...