User blog comment:Imouto-tan/Astraea Sears/@comment-4867780-20160429111103/@comment-26362471-20160430195941

To by perfectly fair Astraea and Chelia are both extensions of Sherria, so they kind of have to deal with her suddenly hijacking their bodies to do something that she wants to do just like the other memory vessels. She treats them as other people to an extent allowing them to make friends and have private lives, but will intrude if she does not approve of their behavior.