Once he was given such an opportunity, he would certainly be confident enough to bring the Section Ambassador under his control.
However, Charlie also had two plans in mind.
If everything went smoothly, he would naturally be able to take down the entire base without any bloodshed.
However, if he could not control the Section Ambassador, he could simply finish him off silently and then distribute the antidote to all the dead soldiers and the members of the Armed Calvary Guards. He would not h