In Roman legends, the figure known as the guardian of gates and doors is Janus. Janus is depicted with two faces, symbolizing his dual role as both the protector of beginnings and endings. His presence at gates and doorways signifies transitions and the passage of time, reflecting concepts of change and duality. As the god of doorways, Janus serves as a metaphor for the duality in human experiences, emphasizing the importance of looking both ways before making decisions or embarking on new journeys.