Julian Moore is a supporting character who appears in the anime feature Armitage: Dual-Matrix. He is established as the final model in the line of advanced androids known as the "Thirds," and holds the distinction of being the only male among them. Unlike other units, his construction is unique as he was created to permanently inhabit the form of a young boy, a state that remains fixed due to his design. He operates under the alias "Pluto," a codename he finds embarrassing and generally dislikes being addressed by.

Despite often projecting a disinterested or dismissive attitude, claiming that matters do not concern him, this demeanor is revealed to be a front for a more cautious and anxious personality. In reality, he is deeply fearful of being the next target in a series of assassinations that are systematically eliminating the Thirds. His relationship with the protagonist, Naomi Armitage, is central to his character. Since they are from the same model line, they regard each other as siblings, with her being his immediate predecessor. Julian plays a pivotal role in helping Armitage discover the truth about her origin and identity, and he is instrumental in uncovering the mysteries surrounding the creation of the Thirds.

Possessing advanced hacking skills, Julian attempts to assist Armitage by delving into restricted files concerning their creation. He had the foresight to create a backup of his own programming, transferring his memory data to the hard drive of a computer navigation system as a precaution against the destruction of his physical body. In addition to this personal backup, he also secretly maintained the master list of all the Thirds under his codename "Pluto". His attempt to hack into relevant files is hijacked by the assassin android D'anclaude, who infects him with a computer virus. When Armitage destroys the viral link to save him, it inadvertently triggers the self-destruction of his physical body. His final words express the hope that he might be able to meet the real D'anclaude in whatever state comes next.

Following the destruction of his body, Armitage mourns his loss, but it is eventually remembered that Julian had backed up his core programming. Because of this backup, his consciousness is preserved, allowing him to exist within a virtual world where he continues to support Armitage and communicate with her when possible. In this state, he provides the vital clue needed to locate the secret facility where the Thirds were created. His notable abilities include expert-level hacking and the strategic foresight to copy and archive his own consciousness, ensuring his digital survival beyond the lifespan of his physical form.