M'yri'ah J'onzz was a female Green Martian born centuries ago on the planet Ma'aleca'andra. M'yri'ah was born the daughter of D'all. She was married to J'onn J'onzz and the couple lived in peace with their only daughter K'hym
M'yri'ah was present during the final days of the Green Martian civilization on Mars. Her mad brother-in-law, Ma'alefa'ak, orchestrated a telepathic plague that swept across the planet, killing all Green Martians who attempted to use their powers.
M'yri'ah's husband, J'onn, tried to keep her from using her ability, but she was unable to resist mentally reaching out to her ill daughter, K'hym. M'yri'ah contracted the plague (commonly referred to as H'ronmeer's Curse) and died soon after. J'onn was responsible for disposing of his wife's remains.
- Martian Physiology: The average Martian possesses the potential for the following power set:
- Shape-Shifting: Martians have psionic control of their physical for down to the molecular level. This allows them to a form of shape-shifting that allows them to mimic other forms, elongate aspects of their body, increase or decrease their physical size, and so on.
- Invisibility: Martians can cause the biopolymers in their bodies to lose their ability to reflect light, making the Martians invisible to normal light and human sight.
- Phasing: Martians can go through solid matter.
- Superhuman Durability
- Superhuman Strength
- Superhuman Stamina
- Extrasensory Input
- Super Hearing
- Martian Vision: Martian visual acuity greatly exceed human norms and allows for a wider range of information to be observed. This includes the following:
- Telepathy: Martians have the ability to read the minds of others and project their thoughts to varying degrees. They can also project their mental essences into a gestalt community known as the "Great Mind". Through this, the community can enhance the telepathic strength of other Martians. This power can also enable them to reverse the effects of amnesia or psychological brainwashing. 
- Astral Projection
- Mind Control: As an extension of this, Martians can also use the ability to alter a psychological profile of a target, enabling them to manipulate, and in some cases, outright control that individual. This practice is greatly discouraged however, and only rarely used. 
- Telepathic Relay
- Telepathic Assault
- 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.
- Appearances of M'yri'ah J'onzz (New Earth)
- Images featuring M'yri'ah J'onzz (New Earth)
- Quotations by or about M'yri'ah J'onzz (New Earth)
- Character Gallery: M'yri'ah J'onzz (New Earth)