The girl's name was Mary--although rather than having a lamb, she seemed like the lamb herself; innocent, a little bit naive, but following instructions well. Like a lamb to a shepherd.
Perhaps that was why the house was willing to hire her. It seemed like the house manager was finally feeling the shortage of workers after Sarah fired several employees last month.
The girl didn't question things much, which was why she was obediently going to the annex without finding out more. It was rather worrying, but she was also perfect. A clean slate, not yet pulled to any side.
While they could tap into the security footage around the house, there were still a lot of places without any CCTV access. Isolating themselves in the annex, Sarah and Hajin couldn't really find out what happened behind the unsupervised parts of the house.
And if they wanted to spy around, acquiring a house staff was the best option. The gossip circulating between the employees was not to be trifled with.