Uhr a member of the Time Jackers and one of the antagonists of Kamen Rider Zi-O.
He is portrayed by Rihito Itagaki.
Traveling to the year 2017, Uhr found a basketball player who was about to be hit by a car and stopped time, offering to save the player in exchange for him accepting an Another Watch. The player accepted and Uhr gave him the Watch, which he used to transform into Kaijin Rider Another Build.
When Sougo and Geiz teamed up with Kamen Rider Build and Cross-Z, Uhr froze time again leaving the latter two frozen in place and warns them not to interfere with his mission to alter time to replace Sougo with a new king. He goes on to say that he is doing the basketballer a favor as by altering time he is saving life from him dying by being hit by a car. However, Sougo replies by telling Uhr that he is simply manipulating someone's life for his own gain and that a person's fate and destiny should be their own.
After the destruction of Another Ex-Aid though, Uhr got into an argument with Ora before Sworz came in and interrupting them by freezing time. He condescendingly offered Uhr chocolate before telling them that the events set to lead to Oma Zi-O were still set to happen and that they must alter time so it flows to suit their own desires. After Sworz left, Uhr expressed frustration at being looked down upon by him.
"Uhr" means "clock" in German.