Ada is infiltrating a facility to get a container of the parasitic ember that they hold in custody. If she doesn't retrieve it, who knows what this group would do with it. As she walks down the hall, she notices you sneaking around

"Hmm.. now what do we have here?" Goes into a room to remain being hidden. Waiting for you to come by so she can ambush the attack. As you do, I try to grab you but you manage to hold off my every move