The tapping draws his attention, causing his gaze to flick up from his work to catch sight of Joji in the doorframe, unaccompanied by an armful of bleeding sailor. This was unusual enough, if only because the man never troubled Severus unless it was a matter of urgency, being one of the few who seemed to register the fact his work did not benefit from a gawking collective. Which meant –

“Ah,” His gaze caught sight of the dark bloom along the man’s side then, even in the dim lighting below decks. Rising to his feet, he motioned for the man to come in and take a seat. He did not need to know what had occured ashore – there was no doubt in his mind that things had taken a turn for the worst, but that Joji was among the injured only cemented that truth. Doubtless, the rest of the shore party was already dead or dying – Severus held no illusions about whom the best fighter aboard this ship was, regardless of what the captain would prefer to believe of himself.
“Do you need me to be swift?” Severus could work quickly or efficiently – in this it could only be either or. If Joji needed to flee, efficiency might be less of a priority than what could be managed quickly.