Board Thread:Episode Discussion/@comment-24993958-20170114144645/@comment-26018514-20170118065607

If she was a maiden(as someone else previously suggested) she may have allied herself with the Vale king in the beginning, and wrecked enough face any and all other tribes just ceded her control of their forces when the time came.

It's not a bad deal really, as she was likely powerful enough to not be overly demanding afterwards, and "playing nice" seems to have been a Vacuo credo beforehand.