In Mobile Suit Gundam, he was shown to be an intelligent, good-natured man whereas in the Mobile Suit Gundam: The Origin version, he is portrayed as a paranoid old man entrenched in hatred of the Zabi family.
After the death of Zeon Zum Deikun, his children Casval Rem Deikun and Artesia Som Deikun escaped to earth with the help of Jimba Ral (the father of Ramba Ral). They spent several years living a life of luxury as wards of the aristocratic Don Teabolo Mass, who gave them the surnames Edward Mass and Sayla Mass and treated them as his own adopted children.
In the original TV series Jimba is endearingly referred to as "Old Man" by Sayla Mass. In The Origin, Jimba Ral constantly reminded Casval of the Zabi family's betrayal of the Deikuns, with Artesia hating him for this. After narrowly escaping an attempt on their lives by assassins (in which Jimba Ral was stabbed to death), they fled to Texas Colony.