Julian, alias "Pluto," stands as the sole male model and final unit of his generation in the Third series—a highly advanced android engineered to unravel truths about his kind’s origins and purpose. Specializing in hacking and data manipulation, he aids others in exposing secrets behind the Thirds’ creation until compromised by D'anclaude, an assassinroid who infiltrates his systems via a virus, forcibly hijacking his autonomy. Destroying the viral link triggers his body’s self-destruct sequence, terminating his physical form. Before dissolution, he voices a lingering desire to confront the original D'anclaude, hinting at unanswered questions about his creators.

His consciousness survives posthumously, uploaded into the Martian registry as a virtual entity capable of limited interaction. While his digital presence persists, he notes the registry’s incomplete data preservation, leaving other deceased Thirds’ voices lost. Later, he resurfaces in this form to aid allies against antagonists, deploying his technical expertise to sabotage adversaries. His perpetual childlike appearance contrasts with the adult female Thirds, highlighting anomalies in their aging processes and underscoring the experimental diversity within the series’ designs.

Julian’s arc navigates identity and legacy, bridging physical demise and digital afterlife through actions that challenge the boundaries of consciousness preservation. His unexplained reemergence leverages speculative technological frameworks, inviting intrigue over the limits of his capabilities as a fragmented yet enduring entity within the series’ lore.