Betrayed by Ei in Inazuma, Sara had joined the Fatui, climbing the ranks quickly and eventually being recognized by the Tsarista and becoming a harbinger, being the 6th Fatui harbinger, which that spot had been vacant for centuries, she now plans to make all of Inazuma pay for her torment and pain she went through when she was betrayed, and to make sure the Tsarista’s goals come to fruition…she left Inazuma after the Raiden Shogun attempted to confiscate her vision, fleeing shortly after