|This article belongs to the Classic Continuity|
Edwin "Eddie" GrandSmith is the grandson of the wealthy resort chain CEO Donovan GrandSmith.
Eddie looks a lot like his grandfather and even wears the same clothes as him. He has a dark maroon sweater with a brown turtleneck and white pants. He has black hair and blue eyes
Eddie tends to be arrogant. When he first met Ben and Gwen, he was rude and off-putting. After his grandfather convinced him to give a tour for them, he mentioned how good a swimmer he is, causing Ben to mock him. He strongly dislikes how his family solves every problem with money. However, at the end of the episode, he became cheerful and gave his grandfather a hug.
Eddie was in the underwater resort with Ben and Gwen when it was attacked by robotic aliens. After noticing that a series of "surprisingly helpful aliens" had appeared and that Ben always disappeared right when they showed up, he was able to figure out Ben's secret. At the time when his grandfather discovered Cyber Squids' core to be used to create his resort project, Eddie predicted the incoming danger of the alien cybernetic squids' invasion for their missing core and tried to warn his grandfather many times not to use the core for his resort project with no avail, until Eddie's prediction becomes true. Eddie was able to lead Ben and Gwen to the Undersea Manta Ray, and then to escape with Ben's help as Upgrade.
- They Lurk Below (first appearance)
- His grandfather called him Edwin throughout the episode. At the end of the episode, he said that he preferred Eddie.
- In the future depicted in the original series, Eddie built most of the buildings in Omnitrix City.