King of Atlantis, Aquaman's half-brother and rival
Their family bond is complicated by rivalry, imprisonment, and eventual reconciliation.
The plot identifies Orm as Arthur's half-brother.
Black Manta's campaign temporarily unites the two brothers against him.
Orm joins Arthur to locate and fight Black Manta's forces.
Kordax temporarily turns Orm into the instrument of his resurrection.
After leaving Black Manta, Kordax's spirit enters Orm, who then fights Arthur and uses Arthur's blood to free Kordax.
Orm is connected to the ancient royal succession surrounding Kordax.
Orm is an Atlantean royal and learns that Kordax's prison can be opened by the blood of Atlan's descendants.
They share the broader Atlantean effort to survive the collapsing kingdom.
Mera and Orm are both among the Atlanteans who survive and escape Necrus after the destruction of Kordax.
Explore the full interactive character relationship map of Aquaman and the Lost Kingdom
Related entry on Wikidata (Q2096398), public domain (CC0).