Cerberus

Known affectionately as "Kero," this magical guardian was created by Clow Reed to protect the legendary Clow Cards. Alongside his brother Yue, he is tasked with finding a new master, eventually choosing Sakura after she accidentally releases the cards. Though he often appears as a small, winged stuffed animal, his true form is a massive, winged beast. Despite his bossy, gluttonous, and ego-driven personality, he is a devoted mentor who uses his vast mystical knowledge to protect Sakura.