Uno was created by Everett Ducklair and guards the Ducklair Tower after he left. He quickly befriends the Duck Avenger alias Donald Duck when he moved to the tower and becomes his ally and advisor against threats like the Time Pirate or the Evronians

He is love with the reporter Lyla Lay, after discovering that she's an android working for the time police.

At some point, it's revealed that he has an evil back-up system called Dos

Odin Eidolon, a time traveller from the future, is eventually revealed to be the future incarnation of Uno.