I think you did a good job of portraying the unfairness of working on a ship if you are a woman, especially if you are not a doctor but a sailor like Samuel. I think that she and Rajeeyah, who faced unfairness on the ship, could not tolerate unfairness for no reason towards MC, so they went against Arthur and stood up for him.
In general, I began to see Samuel and Rajeeyah more as good friends for MC than romantic interests.
(Sorry if it is poorly written, I am writing through Google translator XD)