Emma's first impression of this man (or man shaped thing, as the case clearly was) was that he was an arrogant asshole. This hardly came as a surprise to her as men in power were so often like that, and with the additional of actual magical power it could only be worse.
But he wouldn't be the first jerk that Emma had dealt with and he wouldn't even be the first one to be her boss. And since it rather seemed he had little interest in getting to know her or being her first port of call for assistance, Emma doubted they would even have that much interaction. If that was Kennet's position, Emma would happily go along with it.
And so she simply said, "understood," with a nod, allowing him to continue without any further input.