Zephyrdor is part of the Glasya-Labolas Clan, one of the surviving families from the 72 Pillars. He's got that troublemaker vibe—the kind of guy who doesn't play well with others, as his ongoing beef with Seekvaira makes pretty clear. Arrogance comes naturally to him, and he's got zero respect for authority; he's not above mocking Sairaorg, even though Sairaorg ranks at the top of the entire 72 Pillars hierarchy. It's the kind of attitude that tends to catch up with people eventually.
Content compiled by AnimeList.moe from publicly available sources.