User blog comment:FairyRaven/Fairy Tail Chapter 456: Orders, Review and Commentary/@comment-1359322-20151010095330/@comment-5303512-20151010104024

Well it could be that Sayla excepted her fate of being taken over. Perhaps when Mira found her she was depressed because her Kyouka was gone and had no reason to live so Mira tried to save her because that is totally in her character to be nice to people.