Not unexpectedly, it had been another stressful day for him. The reasons for his stress are far from important in this scenario; the main aspect is the need he felt to get out of the castle and breathe in air untainted by the smell of ink and overworked bodies. The reason wasn't the cause of his fleeing, but the stress itself shoved him out the door and into the rain without an umbrella to shield himself.
He couldn't find it in himself to regret not grabbing at least a raincoat before dashing out into the storm, more specifically because he was distracted almost immediately by the dirty man tucked between the roots of one of the many giant trees on the grounds. The rain that soaked through his clothes became the least of his worries, even if the water running down his back was ruining the fabric he had spent plenty of money to acquire.
He called to the man from where he stood, but didn't get a response. He at first thought that maybe the man was unconscious, but the man adjusted himsel