A brilliant locksmith and inventor from Thenuria. Creator of the Cosmic Key, he aids He-Man in his quest to stop Skeletor and navigate interdimensional travel.
He-Man protects the inventor whose device is essential to the mission.
He-Man and his companions rescue Gwildor from Skeletor's troopers, and Gwildor's prototype Key later opens their route back to Eternia.
Julie supports Gwildor's effort to repair and use the Key.
Julie becomes involved with Gwildor and the Eternians after the Cosmic Key reaches Earth, and she helps pursue the stolen device.
Their opposing claims over the Key drive the interdimensional conflict.
Gwildor invents the Cosmic Key, while Evil-Lyn steals a Key and uses it to help Skeletor open a portal to Castle Grayskull.
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Related entry on Wikidata (Q5623605), public domain (CC0).