Relena's adoptive father, Darlian was once the right-hand man of the Peacecraft family. When the Sanc Kingdom was invaded, he took Relena to safety, adopting her as his own daughter. As tensions between Earth and the colonies rose, Darlian advocated peace with the oppressed colonies even while the Alliance sought tighter control. Somehow, Darlian learned the truth of Operation Meteor and became a target of Dekim Barton's, only to be saved by the young Heero Yuy. [Wikipedia]
