Dayan began as an ordinary domestic cat living near Earth's Revento Hill. One snowy day, he encountered a mysterious green door radiating music and light. Passing through it transported him to the magical world of Wachifield, transforming him from a simple cat into a central figure within this new realm.

Settling alone in the Moriban hut on Tasir City's outskirts, Dayan quickly forged lasting friendships with local inhabitants like Marcy the rabbit, Ivan the crocodile, Jitan the cat, and Willy the mouse. These bonds established him as a well-liked and integral community member. His daily life unfolded with small adventures alongside friends, seasonal activities, and leisurely pastimes such as napping, reflecting his adaptable and sociable nature.

Dayan's existence in Wachifield later unfolded as tied to a special mission. When an unnatural eternal winter threatened Tasiel, the Great Witch Se employed time magic, sending Dayan and Jitan into the past. There, they confronted existential threats to Wachifield: the Snow God, seeking to blanket the world in snow for protection, and the Forest of Death's Demon King, aiming to conquer Tasil. This journey revealed Dayan's crucial role as a protector of Wachifield's balance and harmony.

Throughout his adventures, Dayan maintained connections to his origins. His Earth owner, Reamer, was identified as a descendant of the Great Witch Se, linking his past and present. Key figures like Mr. Shoebill facilitated his movement between worlds, emphasizing his unique position bridging ordinary and magical realms. His relationships and experiences, such as traveling with the wise Jitan or relying on Ivan's inventive creations like time-flying wings, further shaped his identity as a curious and resilient adventurer.

The character appears in the segment "Dayan and Jitan" within the anthology film, continuing his established narrative of exploration and camaraderie in Wachifield.