(Scene) Bill just referred to himself and Louis as equals in private because he learned of Louis' backstory. Bill calls them equals as a means to lighten the already tense mood. Louis is outraged by the use of the word equals to describe them. He knows Bill went to the black market and is in turn, already spiteful toward him. He draws a gun and speaks while pointing it at bill's head 

"Don't you dare touch me. and SHUT UP!" *confidently "This is just a gun. Why are you so surprised? There are many weapons with wills of their own roaming this world. That's why I have the gun. Your fate is in my hands regardless. If anybody finds out about my past, I'll shoot you. Do you still dare to claim... We're Equals?"

acting, performative.)

I dare you to take a drink of my blood! Only then will you become a true reaper! 

(questioning turning into anger as it is read)

They're... taking pity on me...? Hey, stop it. Why are you all pitying me? Stop it!!