Lilly talked with Zain while admiring the cute face of William. As for the shadow Zain was talking about, Lilly had already known about it for some time.
She had sensed the shadow when they had stopped to talk with Grandpa Marvin. From there, the shadow had been following them.
Lilly had to say that she was impressed with this shadow. It was clear the person was a master in concealing Techniques, and Lilly could guess that the person was an assassin.
The reason why she was impressed was because of how the shadow was behaving. The person was very skilled, so skilled and powerful that Lilly was sure there was no one in the town who could actually match it.
Forget matching; she was sure nobody could even sense this shadow. The assassin was just too skilled.
Not only that, the assassin was also a true veteran Assassin. Lilly had gathered so much information just from observing the actions of the assassin.