Ullman was a human who lived in Central City in the latter half of the 31st century. He was the personal manservant to High Councilor Zaius. General Urko once blustered past Ullman in order to steal a miniature grenade from Zaius' office cabinet. Ullman never revealed the theft to his master however. Later, Zaius' inquisitive assistant Galen asked Ullman what it was like being a human, but Ullman didn't really understand the question.