Launcelot creeped up to the door, his posture slightly crouched and his shield raised up to chest-level so he could, at a moment's notice, put his shield up to cover his face or retreat to defend Li. His movements, despite the heavy full-plate he wore, were surprisingly silent.
He could move in a way that minimized any ambient noise, and it was not like he was slowly inching forwards like a slug. His movements were relatively fast, as fast as could be to sneak around wearing armor like that, and he reached the door within a few seconds.
It was obvious the shielder had trained to move silently, though why an upfront tank would need such skills or where he would have learned that was a mystery.
The knocking continued. Then a pause. Then a few much stronger knocks – strong enough to rattle the door nearly off its hinges – pounded on the wood.