Gihren Zabi

Gihren Zabi (ギレン・ザビ) is the eldest son of the Zabi family, a part of the leaders for the first Zeon resistance against Earth. Planning to live as a well-known dictator rather than seek peace, Gihren is one of the strongest promoters of continuing the war with Earth after the death of his younger brother, Garma. Armed with passionate speeches and an unmistakable ambition, he abuses the sorrow felt by loyal supporters and family to invigorate them to fight.

Aware of his father's wishes to cease the destruction and create peace talks, Gihren has the Zeon's Solar Ray fire a blast in the direction of his father's ship. Gihren acts as though their father's death was an unfortunate casualty, but Kycilia is aware of his treachery. During the climax of the One Year War, she shoots him dead to avenge their father.

Mission Mode
Gihren is a Terminal only character in Mission Mode. He invigorates his Zeon troops to rise up in arms and resist the Federation. If the player's character says "Hail Zeon!" after his speech, they'll become a member of Zeon's forces and will be greeted by Dozle Zabi and Char Aznable. If they refuse, their friendship with Gihren and Dozle will decrease. Completing all of the three missions for Zeon will have Gihren personally congratulate the player's character while expressing personal interest in them. He wonders about their future plans with Zeon and the player has the choice to continue serving under Dozle. Gihren approves though he warns them to not do anything rash, wanting to keep tabs on the player's character. This also unlocks Dozle as a playable character.

The only possible ways of boosting relationship ratings with Gihren is by completing the Zeon missions and other missions that increases friendship ratings with several characters at once. He will not personally appear in battle.

In Dynasty Warriors: Gundam Reborn, he is one of the main antagonists of the Is This a Bug? story.

Personality
Cunning and ruthless, Gihren seeks to create a new totalitarian rule under his name. He believes humanity is overpopulated and only wasting natural resources; he plans to "cleanse the filth" and create a new order for humanity. Cold hearted and selfish, Gihren doesn't genuinely care for any of his family members, instead seeing them as rivals to his rise to power. Although he doesn't believe in Newtypes, he is also willing to use them as propaganda for his desires. His father called him the Adolf Hitler of their age and feared the consequences of approving the plans for Gihren's weapons of mass destruction.