So I stumbled upon this and a friend of mine and myself have come up with a theory. The stranger has used vex tech to travel throughout time and has been around since the traveller was found. She has been watching the way the humans have had wins and losses and waiting for a worthy guardian (the player) to come along. She has hinted that she is distrusting of the traveler. This has risen the question of the travellers intensions. Therefor she knows that the traveller is evil.but does not want to tell the guardian yet to ensure that the future remains the same. She will tell us, but when the time is right. She has travelled time to know when the time is correct and knows just what to say to ensure the best future for the good of man.