Raine's order was something that they would never expect, it was only Serefina and Raphael who didn't feel surprised by this.
After all, Raphael had seen how Raine handled herself very well when she had to kill her own friend, while Serefina knew from the determination in Raine's eyes that the girl wasn't the same little girl, who would be scared of something remotely gruesome.
Raine had been through a lot of hardships and witnessed many gruesome scenes to be able to reach this point of her current calmness.
Maybe the disappearance of Torak served as a trigger for her as she always saw Torak as the most important person in her life.
Raine would do everything to save him and she did what she had to do. If by becoming stronger and having a heart hard like a stone were two of the requirements for her to increase the possibility to save Torak then she was doing it very well.