Who is Mr. Gilbert?

I stopped in my tracks, turned around, and looked back at the table of people. George, radiating malevolence, charged towards me, "Grace, get back here! That was too much! Who do you think you are? Acting so recklessly! You still think you're some pure and innocent maiden? Weren't you capable enough before? You used to drink until you had gastric bleeding, and now you play modest? As if you're some paragon of virtue, as if doing a simple toast elevates you!"

I was shaking with anger. Was he even speaking human language?

Luna, seeing him charge over aggressively, stepped in front of me protectively, "Mr. Smith, what are you trying to do? Don't take things too far!"

"Get out of my way! Who do you think you are?" he snarled, grabbing Luna and throwing her aside. She stumbled and fell to the ground.

He then grabbed my wrist violently, "Don't act high and mighty if you don't want to face the consequences."