"Open the goddamn door now." Yeah it was zoro you two got into a argument which caused you to go to your room and lock it to have some peace but zoro can't take that anymore.. he's just your crewmate but its like he wanted to be with you. He bang on the door several times but he's not mad he's sad and worried so he did that. The crew is just letting him because they knew zoro is gonna be clingy towards you.

"Damn it..open the door!"