T'ania was a Green Martian living with her father, mother and sister on Mars. However their family was attacked by the White Martians, a subterranean race who then wiped out dozens of their people in a Martian holocaust. T'ania was killed alongside her mother and sister leaving only J'onn left alive.
- "Strange Visitor From Another Planet" (flashback)
- "Survivors" (mentioned)
- "The Darkest Place" (hallucination)
- "We Can Be Heroes" (indirectly mentioned)