Sincerity: The Weaponsmith and the Steel Princess

"Sincerity: The Weaponsmith and the Steel Princess" is the ninth episode of the first season of the Queen's Blade anime.

Story
Steel Princess Ymir announces that she will take vengeance against Cattleya for selling low-cost weapons compared to the Steel Mountain ones that she creates. Cattleya leaves her son Rana in charge of her store, and Echidna shows up asking Rana where Leina is. Cattleya runs into Leina and Nanael on the road and asks to look at her weapon. Ymir shows up at Cattleya's store and encounters Echidna there who scares her off with her snake. Cattleya and Leina return and run into Echidna. Echidna relates the tale of how Cattleya and Owen used to be great warriors before they retired. Tomoe and Shizuka are looking for a map to get to the capital city and Risty shows up to sell them one. Echidna leaves during the night, and the next morning Ymir finds the real Cattleya and challenges her to a fight. On Rana's insistence, Leina tries to help and finds the Giant Slayer weapon which she gives to Cattleya, who uses it to defeat Ymir and decides to enter the Queen's Blade. Cattleya later gives Leina a new sword. While leaving town, Leina runs into Risty on the road.