Koko is a magical fairy character appearing during nighttime adventures within an animation studio. She possesses wish-granting powers, pivotal when Baja wishes to save a duck friend from an attacking drawing and later desires to experience the sea. Her role involves enabling imaginative experiences through magic, directly responding to characters' aspirations or needs.

Koko engages in banter and rivalry with another magical entity, Gi. This dynamic introduces conflict or contrast within the story's magical sequences.

Her involvement consistently centers on facilitating Baja’s explorations into fantastical realms. This includes countering supernatural threats to the duck companion and fulfilling Baja’s curiosity about real-world locations like the ocean using her wish-granting abilities. Her actions drive key nocturnal escapades that define the narrative's fantastical elements.

Koko's appearances focus exclusively on her functional role within Baja’s adventures; no concrete backstory, origin, or personal development is detailed.