Justin is an minor character from the 1983 animated series He-Man and the Masters of the Universe.
Justin joined his father Hovar, Eternia's Royal Historian in investigating the ancient ruins of Selkie Island, which had once housed a rich civilisation that had somehow fallen and disappeared without a trace. Father and son soon found themselves having to fend off the dangerous creatures that roamed the island. Although frightened of the animals, Justin only used the laser guns in their camp to frighten the creatures, never to hurt them. When the lasers began to run out of power, the young lad wished he and his father had never come to the old ruins. However, his father patiently explained to him that it was his job to find out the history of island's former inhabitants.
Hovar sent a distress call to Man-At-Arms, who build a Variable High-frequency Oscillator (VHO for short) that emited a high frequency annoying to most animal lifeforms. Teela and Prince Adam, aided by He-Man managed to transport the VHO across the Crystal Sea just in time for Hovar and Justin to be saved. Once the VHO was installed on various strategially placed poles all around the explorer's camp, father and son could continue their archeological studies in peace and savety, for Justin had decided that he wanted to be just like his father when he grew up.