Will was only aware of the knife heading for his head when Leila knocked it out of the air, mere inches from the back of his skull. A shiver ran down his spine as he wrapped both hands around his sword, raising it as he scanned the streets carefully. The two sisters took up their own displays- but that had never been Will's style. He kept his back to Leila and Kat, searching the shadows for the slightest sign of movement. The sound of metal on pavement sent chills down his spine, but he knew that they were trying to distract them. He kept his attention on the streets themselves, listening closely to his surroundings. They had to be surrounded.
He shifted onto the balls of his feet, already mentally flicking through tactics. Andei had put nightshade into his pack, so even if he was disarmed, he wasn't going to be entirely helpless. They probably had archers on the roofs, so he needed to be ready to stick close to the ground and move as quickly as possible. If they had to scatter, the shadows would be best to avoid the archer- but that was also risking encountering more foot soldiers. So, the best tactic was probably to stay as close to his opponents as possible, make it hard for them to strike without risking injuring their comrades. That is, if the Daggers weren't beyond attacking their own people.
Something moved in the shadows, causing his hands to tighten around the sword. He didn't call out though. Partially because he didn't want to draw any unnecessary attention to them, but also partially because he couldn't think of anything smart to say.