Dorel Ronah

He is the son of Carozzo Ronah and the half-brother of Berah Ronah/Cecily Fairchild. Though he is not blood-related to Meitzer Ronah, he was adopted into the Ronah Family because of Carozzo's marriage to Meitzer's daughter. Within the Crossbone Vanguard, Dorel is a Mobile Suit squadron commander and the rival of Zabine Chareux, the commander of the Crossbone's elite Black Vanguard squadron. (villains.fandom.com)