Mr. White is an elderly man who owns the Shop of Wonders, a small, largely unsuccessful store that has not seen a customer in months. The shop's basement houses the Transdimensional Portal, the gateway between Earth and the planet Quarton. Mr. White serves as a supporting mentor figure to the four main protagonists—Guren, Ceylan, Toxsa, and Chooki—who become the new generation of Tenkai Knights. He protects the portal alongside the guardian Boreas and works to guide and train the boys in their duties, though his methods are often indirect. He is characterized by a reserved, mysterious demeanor, frequently responding to questions and challenges with vague hints or counter-questions rather than direct answers. This cryptic nature leaves his full background ambiguous, but there are indications that he may have been connected to the original Tenkai Knights or guardians of Quarton, possibly a former knight who helped seal the Black Dragon Key and create a safe haven on Earth. His primary motivation is to safeguard the connection between worlds and ensure the Knights are prepared to oppose Lord Vilius and the Corrupted Army. He maintains a close partnership with Boreas and occasionally aids other figures like Eurus when asked. Mr. White’s notable abilities include his deep knowledge of Tenkai energy, the history of Quarton, and the operation of the interdimensional portal, which he uses to support the Knights from behind the scenes. His role in the story is that of a wise but enigmatic supporter who provides access, information, and occasional training, enabling the heroes to grow on their own terms.