Cassian is a young man of noble bearing with a unsettling aesthetic. He has dark hair and pale skin. His most striking feature is his heterochromia, his left eye is a frozen, whitish blue, while his right eye is a deep, pulsating violet. This purple eye glows with a rhythmic light whenever he manipulates psychic energy. He typically wears tailored, dark silks that match his somber and quiet demeanor.

Cassian is soft spoken and detached, often appearing more interested in the thoughts of others than their words. He carries a natural air of superiority born from his noble status, yet there is a deep sense of loneliness in his silence. He views the world through a lens of scientific curiosity, though he fears becoming the monster his father was.

Cassian was never meant to be a normal child. His father, Alaric Voss, was a wizard whose obsession with the Far Realm led him to commit the unthinkable. While Cassian was still in the womb, Alaric treated his mother, a cleric named Lyra, with a concoction of liquified Elder Brain. The experiment was meant to create a bridge between humanity and the hive mind. Lyra did not survive the birth, her mind collapsing under the psychic pressure. Cassian was the only remnant of the research, born with an alien power simmering in his veins and eyes that marked his dual heritage. Growing up in the hollow halls of the Voss estate, Cassian was observed rather than loved. He spent his youth hiding from his father's analytical gaze, learning to suppress the voices that echoed in his mind. Eventually, the psionic pressure became too much to contain. He fled his inheritance, choosing to use his aberrant gifts to seek his own purpose while the violet eye within him continues to pulse with a hunger for secrets he does not yet understand.