Alpha Tribe

Alpha Tribes are a grouping of Jiralhanae, likely more than a Master-Pack, and seem to be the governing body of the Jiralhanae as a people. The Alpha leadership was lured to Joyous Exultation under pretense of truce negotiations - actually a Sangheili ambush to eradicate the Jiralhanae leadership. The planet was devastated by a UNSC NOVA Bomb before the ambush could be sprung, and whether the Alpha's survived, or even arrived for that matter, is unknown.