Ep. 5: Diablo and Horn encounter a black dragon while Rem and Shera face Gewalt and Ifrit.

Diablo loses his staff to a river but saves an unconscious Horn, sacrificing his shirt and cape to start a fire. He removes her wet clothes and is embarrassed to discover Horn is a girl, having mistaken her for a boy due to her masculine attire. Horn explains she is an orphan who dressed as a boy to gain respect. While waiting for her clothes to dry, she notes that Diablo reminds her of her father. Meanwhile, Rem, Shera, and Lumachina ascend several floors but are attacked by Gewalt again. A massive black dragon appears and attacks them all. Gewalt summons the fire spirit, Ifrit, but the dragon destroys it and critically injures him. Lumachina heals him despite him being an enemy, but he remains unconscious. Diablo and Horn arrive. Though weakened without his staff, Diablo injures the dragon, who attempts to escape, but the maid golem Rose appears and kills the dragon for cowardice. Diablo recognizes Rose as his faithful NPC ally, while she recognizes him as her master and lets them into the treasure room. They go to a white ox statue that heals Lumachina of Death Knell when she touches it. Diablo gets new clothes and a staff while Rem and Horn reluctantly change into revealing outfits that Diablo explains will strengthen and protect them. Shera puts on a ring she finds. Rose is jealous of the other females in Diablo's life, but is placated when Diablo gives her a hair broach. They prepare to take the white ox statue back to the surface, but Rose uses a viewing screen to show Zircon Tower City is under attack by Varakness' army.

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