Caralee is an impoverished woman originally from the dangerous wastelands of Ashtown, now working as a traverser for Earth Zero's wealthy Wiley City. She is exceptionally valuable to her employer because her disadvantaged background means her doppelgängers have already died on 372 out of 382 known Earths. She constantly manages the tension between her rough origins and her desire for a permanent, safe place inside the walled city.

Dell is Caralee's watcher and handler at the Eldridge Institute, responsible for monitoring her missions across the multiverse. Coming from a wealthy, traditional family in the privileged Wiley City, Dell projects a strictly professional demeanor. Despite her rigid adherence to corporate protocol, she harbors hidden vulnerabilities and a complex, unspoken dynamic with the traverser she manages.

Adam Bosch is the brilliant and powerful CEO of the Eldridge Institute, which controls multiverse travel on Earth Zero. He presents himself as a charismatic, benevolent leader who rescued traversers from the impoverished wastelands to give them purpose. Underneath his polished corporate exterior lies a ruthless ambition and a calculated approach to maintaining his monopoly on traversal technology.

Nik Nik is the feared, violent emperor of Ashtown, ruling the toxic wastelands with an iron fist. Raised by a brutal predecessor, he maintains his grip on power through fear and the use of his enforcers, known as runners. His immense authority makes him a central figure in Ashtown's harsh society, and his mere presence serves as a haunting reminder of the violence inherent in the wastelands.

Jean is a senior traverser and respected mentor at the Eldridge Institute. Having survived a harsh past as a child soldier before securing his place in Wiley City, he serves as a paternal guide for younger traversers. He is highly pragmatic, believing that survival in an unjust world often requires looking the other way when powerful institutions cross ethical lines.

Esther is Caralee's devout younger stepsister, living in the agrarian, religious community known as the Rurals. Unlike the cynical residents of Ashtown or the privileged citizens of Wiley City, Esther possesses a quiet strength rooted in her faith. She acts as the moral compass of her family, offering unconditional love and standing as a pillar of stability.

Nelline is Caralee's doppelgänger from the parallel universe of Earth 175. Unlike Caralee, who managed to escape to Wiley City, Nelline remained in the brutal environment of Ashtown, where she learned to survive the dangers of her world through sheer cunning. She is a hardened survivor whose difficult circumstances have shaped her into a deeply calculating and pragmatic individual.

Exlee is the nonbinary proprietor of the House, a politically powerful brothel and sanctuary in Ashtown. Serving as a crucial stabilizing force in the chaotic wastelands, Exlee commands a vast network of information and loyalty that rivals the emperor's power. They act as a shrewd, unflappable surrogate parent to the marginalized youth who pass through their doors.

Mr. Cheeks is a high-ranking runner, serving as an enforcer in Ashtown. Recognizable by his signature onyx teeth, he initially appears as a formidable part of the wasteland's criminal hierarchy. Despite his intimidating exterior and profession, he operates by a strict personal code of honor and deep loyalty.

Mel is Caralee's mother, who now lives in the pious community of the Rurals. Having survived a deeply traumatic past defined by addiction and exploitation in Ashtown, she has since found sobriety and religious faith. Her difficult history has left her emotionally distant, creating a strained and alienated dynamic with her daughter.

Michael is Esther's twin brother and Caralee's stepbrother. Raised in the strict, pious environment of the Rurals, he chafes against his family's peaceful ideology. Drawn to the dangerous allure and power of Ashtown's criminal enforcers, he represents the restless youth who seek identity and autonomy outside societal expectations.

Daniel is the spiritual leader of the Rurals and the patriarch of his blended family. He is a figure of unwavering kindness, integrity, and warmth, providing a sharp contrast to the violence of Ashtown and the coldness of Wiley City. He leads his community with genuine compassion and serves as a highly stabilizing presence.