The primary functions of mythical creatures in cultural stories include serving as symbols, guardians, and embodiments of moral lessons. They often represent fears, desires, or archetypal traits, helping to convey complex ideas in accessible narratives. Creatures like dragons or unicorns can symbolize chaos or purity, respectively, while others serve as protectors of sacred spaces or as challenges for heroes. By integrating these beings into myths, cultures embed important teachings that reflect societal values and collective human experiences.