Grebb, an obnoxious, irritable jackal, sat on the United Animals Security Council. Alongside Harman and the Secretary General, Grebb was one of its three main leaders. When Bucky O'Hare proposed that the U.A.F. sign a treaty with Captain Lanelle of the Corsair Canards in order to combine their forces against the Toad Empire, Grebb, who detested pirates, was against the idea. When Harman agreed with Bucky, a furious Grebb left the council chamber and did not participate in the signing of the treaty. Later however he apologized to the pirates after it turned out Harman was a spy for Al Negator.
- He is named Sanzer Griff in the Web Series.