The Seal of the Brothers Tenkû no Esukafurône : Season 1 Episode 5

After his capture by Dilandau and the Dragon Slayers, Van is imprisoned aboard the Zaibach floating fortress Vione. Here, the Zaibach strategist Folken reveals his identity to Van and attempts to invite him into the folds of the empire. Fortunately, Hitomi uses her dowsing abilities to discover the Vione, and the crew of Allen's ship Crusade mount a rescue operation...