Madourin Zaruba is a sentient magical ring featured in the Garo tokusatsu series. Zaruba serves as an advisor and companion to the protagonist, Kouga Saejima, the Golden Knight Garo. With a wise and sometimes sarcastic personality, Zaruba provides valuable insight, detects Horrors, and offers magical assistance in battle. Despite being an object, Zaruba is an essential character, often guiding and supporting Garo in his quest to protect humanity from supernatural threats.