This was most evident in the speech Gihren gave at Garma's state funeral. With the death of Degwin's favorite son Garma Zabi in battle, Degwin withdraws from day to day duties as Zeon's leader which effectively made Gihren the leader of Zeon. One of the heads of the Principality of Zeon, Gihren is the oldest son of Degwin Sodo Zabi, the ruler of Zeon and the instigator of the war with Earth. He is also a gifted orator, able to rally the people of Zeon after the death of his brother Garma. Granted a high IQ (Intelligence Quota) of 240, Gihren is a highly gifted and well educated person.

Though highly talented, this also affects his realism, relying solely on overwhelming firepower and prototype machines to achieve victory. Sticking to the homeland of Side 3, Gihren mostly hands orders to his other siblings and expects them to succeed without failure. As the essential leader of Zeon, Gihren belittles the dwindling power of his father and continuously schemes to turn the One Year War into a total war. In short, Gihren is best described as ambitious, underhanded, overconfident, and a motivator. His voice is a hybrid between Char Aznable, and Bright Noa's voice, similar to Jerid Messa's voice but more aggressive. The voice of Gihren was provided by MSGoR's creator, Nick De Leon, who also voices for Amuro, Bright, Char and Mirai, along with any additional male character roles.

On OctoU.C., Gihren became the Supreme Commander of the Principality of Zeon, and addressed the nation that the Zeon are now aggresive than ever. Although not shown in Mobile Suit Gundam on ROBLOX, Gihren is an Admiral early in the series until the death of his younger brother, Garma Zabi.

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