Qoo Morimoru is a small, mysterious creature with light blue and white fur and gold eyes featuring diamond-shaped pupils. He wears a bronze headpiece and a violet cape with gold trim, fastened by a blue diamond-shaped brooch; the cape has blue diamond-shaped attachments at its corners and frills along the bottom. A brown belt with an attached pouch circles his waist, and he wears brown coverings on his legs. A distinctive bell is attached to his fluffy white tail, ringing only during significant moments. Believed to be a spirit sworn to protect the kingdom of Hortensia, he demonstrates loyalty to its royal family. Qoo Morimoru communicates in human language, consistently ending sentences with "moru." His actions focus on safeguarding key figures: he warns the knight Fernando of imminent threats to the king's life, later alerts others to dangers facing royal family member Mariel, and urges Fernando to act quickly during crises. He also expresses concern for Marius, advising against solitary movements to prevent causing worry. Qoo Morimoru is identified as a guardian intrinsically linked to Hortensia's well-being, though his origins remain undefined.