Mars is the son of Zeno and Carolina Ayers, and the clone/twin brother of Dallas Ayers. He was created by Zeno for one purpose: to harvest his body to transplant organs into his dying son, Alchemist. When Mars was created, Alchemist was severely ill and near death — at first, Mars was what is called a dolly clone, used solely for organs. Zeno took his heart to save Alchemist's life.
After Alchemist recovered, before Zeno discarded Mars's body, Alchemist pleaded with his father to revive him. Zeno brought him back to life. Although Mars was cloned from Alchemist at age thirteen, at the time of the story in 3007, Mars is only ten years old — created with the physique of a teenage boy, but the mind of a newborn.
Zeno tried to integrate Mars into society, but it took a long time. During Planet X: Dawn of a New Age, Mars's mindset is menacing as he develops through an adolescent learning stage. However, as Zeno became preoccupied with ascending to the role of secretary-general, he began to neglect Mars — slowing his development and preventing him from reaching his potential.
Mars began to feel like a forgotten son. He looked for affection and wanted to be accepted — mostly by Zeno. This is what caused him to develop behavioral disorders, including reactive attachment disorder (RAD). Feeling forgotten, Mars went to increasingly extreme lengths to grab Zeno's attention, competing with his brother Dallas in a desperate attempt to win their father's love.
A Life Created for Another: Mars was brought into existence solely as an organ donor for Alchemist. His revival — a gift from Alchemist's mercy — does not erase the trauma of being treated as expendable from birth.
Reactive Attachment Disorder: Zeno's neglect in the critical stages of Mars's development leaves him with deep emotional dysregulation — a condition that drives many of his most extreme and dangerous choices throughout the story.