Child
The mansion was no battlefield. Khan didn't kill out of self-defense or to serve a higher purpose. That was proper murder, and the audience could only watch as blood dripped from Amy's severed head.
Needless to say, silence enveloped the reinforced hall. Khan was now a Prince, so most of his actions were justified, especially toward an inferior family that had insulted him. Yet, executing someone without trial or dialogue sounded too much, even for those lofty parties.
The explanation behind Khan's action was evident but also scary. He had killed someone who had betrayed him. Still, the situation involved far more than simple revenge, giving insights into Khan's mindset. His behavior told everyone that the environment, the place, and the individual didn't matter to him.