- Real name: E. Davis Ester
- Alias: Calamity King
- Identity: Public
- Alignment: Good
- Gender: Male
- Occupation: Legionnaire
- Family: None known
- Affiliations: Legion of Super-Heroes (Pre-Zero Hour); Touston (homeworld)
- First appearance: Adventure Comics #342 (Mar 1966)
- Universe: Pre-Zero Hour
- Alternate versions: none known
E. Davis Ester alias Calamity King was a jinx. Born on the human colony of Touston, he caused trouble for his friends and family wherever he went. Ester was born a metahuman, his powers caused bad luck - creating spontaneous stress fractures physical and mental in people and objects.
He applied to become a member of the Legion of Super-Heroes but was rejected on the basis that he'd be as much a danger to his teammates as he would be to the Legion's enemies.
The Legionnaire Star Boy's expulsion from the Legion was briefly blamed on the fact that he had shaken Calamity King's hand, although this and other superstitious feelings the Legionnaires had at the time were blamed on the imitation Luck Lords of Thaun.
Some years later, when the Legion was short of members, Ester was invited to join. He had improved his control over his power - although not prefected it. However, he remained a member only briefly before the Legion was disbanded. He was thereafter imprisoned by the Dominators.