The Timekeeper was the main character in the attraction of the same name.
The Timekeeper is a eccentric scientist from M.I.T.T. (Metropolis Institute of Time Travel), who by inspiration from the works of Jules Verne and H.G. Wells, builds a time machine, presenting his invention at venues such as the Visionarium in Discoveryland and Metropolis Science Center in Tomorrowland.
With the help of his assistant, 9-Eye, the Timekeeper was able to transport himself and the guests to different times in Earth's past, present, and future.
The Timekeeper was designed specifically with Robin Williams in mind when the attraction was first developed for Disneyland Paris. However, French officials insisted on the attraction featuring a French dub, resulting in Robin Williams only being heard as the character when the attraction was brought to the Magic Kingdom.
The Timekeeper's design would later be recycled for Tom Morrow at Disneyland's version of Innoventions.