Lakumajo leads the Four Great Magicians and rules Jewel Land, yet displays a surprisingly relaxed and occasionally irresponsible demeanor. She delegates critical missions like recovering scattered Jewelpets to humans rather than Jewel Land forces, suggesting trust in humanity's abilities. Lakumajo maintains secret direct communications with Japan's Prime Minister concerning the Jewelpets and their retrieval mission. Through the Jewel Pocketbook, she guides its holder—later revealed as Rinko Kougyoku—by advising on Jewelpets' locations and tracking threats such as Diana. Lakumajo utilizes a specialized altar and her magic to create Jewelpets. Historically, she joined her fellow magicians in defeating the rebellious siblings Dian and Diana, resulting in Dian's imprisonment within an icy crystal for millennia before the series' events.