Watch The Familiar of Zero: Episode 12 English Dubbed episodes and free chapters. English Dubbed Episode guide, chapter The Familiar of Zero: Episode 12 The Zero Secret Treasure.The gang has located a rare dragon, which Siesta’s family has kept a map. It turns out to be a Mitsubishi Zero-sen, a Japanese aircraft used in World War II. They bring it back to the school. Colbert said someone earlier used another aircraft to fly during the solar eclipse and disappeared. Saito concluded that the person returned home and this is his chance for him to return home also.