Kekkaishi EP13 - Appearance of Masamori, Captain of the Yagyou

Yoshimori thinks about being the legitimate successor and gets in a bad mood when he doesn't understand why he is the successor and not his brother, Masamori, who is more skilled than he is. At Karasumori, Yoshimori and Tokine encounter an ayakashi that stinks so bad that Hakubi and Madarao's sense of smell is greatly disrupted. Masamori watches from afar and is able to find the ayakashi with his partner, Kurohime, but sits back and watches how Yoshimori handles it. The ayakashi's shell is very hard and difficult to break and just before its blades were going to slice Yoshimori, Masamori interrupts its attack and destroys one of its blades. He then creates a 5 layer kekkai surrounding the ayakashi and destroys it. Masamori reveals to everyone that he will staying for a few days, much to Yoshimori and Madarao's unhappiness.