J'en was but one of hundreds of Green Martians forced into exile following the "Blue Inferno" event that eradicated all life on the planet Mars. She eventually immigrated to a world in the Cygnus system dubbed Mars II.

On Mars II, J'en met and fell in love with fellow Manhunter, J'onn J'onzz. However, when the ambitious soldier known as the Marshal staged a coup against the exiled Martian leaders, J'en decided to throw in with the Marshal. The Marshal proved to be extremely charismatic and J'en believed that he would lead the Martian culture to greater glory. J'onn obviously disagreed with the Marshal's initiative, and because of it, J'en and he were forced to go their separate ways. J'onn learned that the Marshal planned on invading and conquering the planet Earth. He fled Mars II in a shuttle, hoping to reach Earth in time to warn them. The Marshal sent a squad of hunter ships after him, and J'en was one of the pilots in charge of bringing J'onn down. Although J'onn reached the planet Earth, he was unable to prevent the a full-scale war between Earth's forces and the Martian fleet. During the war, J'en realized that she could not bring arms against her former lover, and she sided with him during the final battle between the Martian commander and J'onn J'onzz. When the Marshal was defeated, the remainder of the fleet agreed to return to Mars II. J'onn elected to remain on Earth, but J'en returned to Mars II with her people.




  • Vulnerability to Fire: Martians are much more vulnerable to fire than the average Earth human. At times this has been portrayed as physical, psychological, or a combination of the two. The effect of this is to strip any Martian of their powers as they involuntarily lose control of their body.


  • Battle armor


  • Single-person Martian warship
  • This version of J'en, including all history and corresponding appearances, was erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths limited series. Even though versions of the character may have since appeared, this information does not apply to those versions.
  • In Post-Crisis continuity, her counterpart is M'yri'ah, J'onn's wife.
  • In Post-Crisis continuity, Martians do not have any body hair. In Pre-Crisis continuity, only the women typically had hair upon their heads.
  • As many Martian names bear phonetic similarities to Anglican Earth names, J'en's name is likely pronounced "Jen", albeit with a distinctive dialect.



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