Since dreams usually reveal the exact opposite of what you believe to be true about yourself, dreams of crying or seeing someone crying is showing the emotion of sadness in its unexpressed form within you. The dream symbolism may be such that it would not normally bring you to tears, and yet, you awaken somewhat sad or perplexed. This is the psyche’s way of exploring unrecognized feelings or pain. Explore whether sadness is an issue unaddressed.
Another character crying portrays unacknowledged suffering in terms of the characteristics that you might associate with them. What adjective would you use to describe them? How do they symbolize an aspect of you? Why would this aspect be suffering? Consider whether there is in fact something that you are not expressing because you are keeping a “stiff upper lip.”