User blog comment:FairyRaven/Fairy Tail Chapter 456: Orders, Review and Commentary/@comment-203.111.234.105-20151010151509/@comment-7418318-20151011065138

At first I was thinking about Mira letting her go, but I think breaking out would be better.

Imagine: Mira and Sayla fighting an internal battle, suddenly enemy soldiers distract Mira and Salya manages to break out and manifest.

The Strauss siblings are all "Oh we are so screwed, there's no way we can fight Alvarez and her!" only for Sayla to turn around and blast the enemy and then saying something like: "In this tale we have a common enemy and thus our hostility is laid to rest for the time being."