Since they were head manservants, their cultivations were at the Sky Ethereal Realm! After all, they were working for two of the top five families.
How could they be weak like some ordinary servant from relatively less powerful families? They were able to remove Roy away from the bed easily and had to knock him out as he was moving around his limbs and howling in a frenzied manner.
Dennisa had fainted with relief and exhaustion and the fact that she couldn't bear to look at her own body anymore. Even the manservants wrinkled their noses upon seeing the ugly deformations on Roy and Dennisa's body.
They also saw Luke and Neo's bodies lying on the sofa, and by just simply inspecting them, they were shocked to find out that they both were dead.
They couldn't understand what happened here or what was going on. This was the most shocking thing they had ever seen happen in their long years of serving the families.