Selene/Open
Selene's steps were silent as she ghosted down the blacked-out corridor, despite her reinforced boots. When you had been going after Lycans - werewolves - in their lairs for centuries you learned to make absolutely no noise, and pay attention to air currents that might bring their scent to you, or yours to them.
Gradually, stopping at cross intersections and air vents, she worked her way away from the murder scene where industrial cleaning chemicals had been used to clean up the mess, hopelessly muddling scents. A certain pattern in the air began to come clear; old blood and something that probably was no longer human. Now her turnings were decided by which way the trace was stronger.