If she spots you as the closest actor, she will start to chase you, but you're literally able to just stick behind a corner, let her get close, and try to time the E press. Alternatively, let her walk up to start snacking on someone, and get her as the animation finishes.
Someone made a mod that replaces her with a smaller, light blue dragon on the workshop, and turns out her speed becomes *much* more hazardous! She is basically sprinting after cock snacks XD