Ep 3. Cat and Dragon!

The third season of High School DxD introduces an episode titled "Cat and Dragon!" which follows the protagonist Issei Hyodo as he continues to navigate his life as a devil alongside his quirky group of comrades. The episode opens with Issei's friend Koneko Toujou, a Nekomata (a cat-like demon), undergoing an unanticipated transformation. Koneko's sudden shift in behavior causes her to retreat and avoid contact with others, particularly Issei and her sister, Rias Gremory.

As Issei and his group attempt to comprehend Koneko's state of mind, they encounter another member of their devil group, Azazel, who brings to their attention the existence of a powerful dragon who has been invading territories across the globe. Azazel's search for the dragon leads him to a secluded cave, where he discovers an isolated figure who he initially mistakes as the dragon. It is soon revealed that the figure is actually a half-dragon, half-human hybrid named Vali Lucifer, who is the descendant of a rival devil clan.

Vali possesses a powerful dragon familiar and is also a skilled warrior, rendering him a potent adversary to Issei and his comrades. Despite their differences, Azazel declares that it is crucial for the two front-line warriors, Vali and Issei, to work together to take down the dragon and prevent further destruction.

As the episode progresses, Issei and Vali reluctantly agree to collaborate and embark on a mission to take down the dragon. Their journey is plagued with obstacles, illusions, and complications as they navigate through a labyrinth of tunnels towards the dragon's lair.

Along the way, Issei and Vali engage in intense combat, utilizing their devil powers and strategic maneuvers to advance. The episode's highlight is undoubtedly the climactic duel between Issei and Vali, which showcases their contrasting styles and incredible powers.

In the end, Issei and Vali's adversarial relationship gradually transforms into mutual respect as they successfully vanquish the dragon. The episode concludes with the group reuniting and celebrating their triumph over the dragon, while Koneko is seen smiling and participating in the festivities, indicating her return to her normal self.

Overall, "Cat and Dragon!" is an entertaining episode that blends action, humor, and character development. The episode's central plot revolves around the confrontation between two powerful characters, Issei and Vali, and the successful collaboration of two opposing forces despite their differences. The episode also explores the character arc of Koneko, adding an extra layer of emotional depth to the episode.