Cloud is a sheep-like creature and a central figure in the group of children who form the core of the story. His origin is unique, as he is not an ordinary animal. He began as a living doll based on Sheep Cloud, the mascot of a brand called Cloud Cereal. The main character, a girl named Sandy, won the Wake-Up Cloud doll in a contest, and after coming into her possession, the doll mysteriously came to life. Following this event, he was welcomed into Sandys family as one of its own.

In terms of personality, Cloud behaves very much like a young child. He is innocent, perpetually cheerful, and possesses an extreme sense of optimism that often defines his interactions with the world around him. One of his most defining traits is his eagerness to help others. He genuinely wants to be useful and contribute to the group, which is a core part of his motivation. However, this admirable quality is frequently tempered by his poor judgment, as he has a habit of biting off more than he can chew. His overestimation of his own abilities often lands him in trouble, a recurring pattern that can cause frustration for his friends, particularly Sandy.

Within the story, Cloud serves as both a companion and a source of gentle conflict. His role is tied to the group of seven children who form a journalism team and embark on various adventures together. Cloud participates in their activities, contributing his unique perspective and energy to the team dynamic. His most significant relationship is with Sandy, who acts as his adoptive sister. She is often the one who bears the brunt of his well-intentioned mistakes, and her irritation with his antics is a consistent element of their interaction. Despite this, their bond is strong, and she is protective of him. Alongside Sandy, Cloud is friends with the other six children, whose names are Jasmine, Lime, Basil, Clove, Nuts, and Cinnamon, and they all work together as a cohesive unit.

Throughout the series, Cloud's development is subtle but present, rooted in his desire to be helpful. While his core personality remains largely unchanged, his experiences with the team allow him to grow in his understanding of friendship and cooperation. He does not have any overt superpowers, but his notable abilities include his infectious enthusiasm and his childlike ability to see the positive side of any situation. His presence often lightens the mood of the group and drives many episodes plots forward, as his attempts to lend a hand are what frequently set the story in motion. He is visually distinctive, often depicted as a fluffy, furry creature who typically wears a beret, fitting his whimsical and gentle nature.