An active guardian in a dream is related to someone who assures you around the protection of yourself or your family. Someone waiting for someone or as a protective spirit of your choice. The guardian is waiting for someone to wake up so that it can come into their life with sympathetic intentions and make sure this person has everything sorted out before they can take responsibility for it themselves.
The guardian in a dream means protecting oneself from the imminent death. In fact, finding two guardians guarantees you life. It always has been taught as such through out history. So this symbolism of guardian of life and protection applies towards modern society.