Cobra is a member of the Oración Seis, a dark guild composed of highly powerful mages. He, along with the other Oración Seis, seek to find Nirvana, a destructive magic power that was sealed long ago. Cobra is accompanied by a huge snake, Cuberios, whom he considers to be his only friend.

Spoiler

He is a poison dragon slayer, because he injected lachryma in his body. In fact, he did it in order to be able to talk to Cuberios.