Jem and Scout have the maturity/open-mindedness to realize that there isn't a need for segregation, social classes and the like. Atticus and Maudie are like this too, and then you have people who feel the opposite way, like Ms. Merriweather, who reprimands her "sulky darky" that it isn't very "Christian" to be sulking around. She acknowledges the differing social standpoints to a point of hypocrisy.
These are the books words, not my own btw
Can you include a text so ik what your talking about
Maybe a lender like if someone lends an eraser
It is a metaphor representing not just the 'mask' of the plague, but also the 'masquerade' of the ball and the 'masquerade' of pretending to escape death.