One of the heads of the Principality of Zeon, Gihren is the oldest son of Degwin Sodo Zabi. Giren was gifted with a high IQ (240) and ingenious oratory abilities. He and his sister Kycilia were constantly at odds with each other as both had similar political goals but different methods. Although Gihren was successful in reducing his father's role to that of a figurehead ruler, he must still endure Degwin's criticisms and scorn.