Desmond was already deep into the depths of irritation. There was no way that he was either happy or inviting to people with a good mood.
Given his already hectic day after the flight of his arrested criminal, there was nothing more irritating than a random woman bumping with a soup and spoiling his uniform. He wasn't ready for that at all, and thus he needed to stay calm to escape from the situation.
It's not like she did not notice his expressions, but she certainly was there for something other than randomly and by mistakenly bumping into the Commander of Stria Knights.
"What ... what did you say is your name??" He asked. He wasn't able to catch it the first time when she said it. Furiously scrubing of the stains he didn't even bother to look at her.
She took a pause and didn't answer him right away. Looking at his current situation where she wasn't answering him, he stopped scrubbing furiously and looked up at her.