Skoll Shorties

She does seem to head in that direction though, should have thought a bit more before doing that ritual.

The Night Warrior is not villainous, nor inherently villainous. Tyrande and Elune alike seek vengeance for the genocide and loss of innocents at the hands of the Horde. If she becomes a villain, I sorely hope the Horde gets what's coming to them. :)

Well she doesn't seem to keep control of herself anymore, she is also up there in self righteousness before becoming the night warrior (Great diplomacy with the Nightborne who were happy to learn that they weren't the last of their kind)

Tyrande expressed her doubts with Thalyssra before proceeding to help liberate Suramar - doubts that may have been well placed given that after Elisande and Azshara, they proceeded to help SYLVANAS. The worst thing Tyrande did to Thalyssra was be reasonably suspicious.