In ActIV, scenes iv and v, of Romeo and Juliet we see the development of the characters from the house of Capulet. Namely, in scene iv, we the lengths Lord and Lady Capulet are attending to in their preparations for the (presumed) wedding of Juliet and Paris. Unlike the prior scenes, where Lord Capulet referred to Juliet as a "disobedient wretch" and both Lord and Lady Capulet threatened to disown her, here we see their caring nature for Juliet. As misguided as their plans for their daughter's happiness may be, they are clearly not the monsters they appeared to be in the prior scenes.
Scene v then further develops this idea as we see the absolute grief the Nurse and Lord and Lady Capulet feel upon finding the "dead" Juliet. They truly care and love Juliet. Scenes iv and v help us to know that they are round characters.