She first appeared in the "Super DuckTales" special as the receptionist in Scrooge McDuck's bean factory. Fenton wanted to invite her out, but didn't dare to do it. Near the end of the special when he finally does; she answers that she wanted to go out with him when he was a bean counter, but he never asked her.. From then on, they began dating.
It is later revealed that Gandra studied advanced robotics in school, enabling her to control a gigantic mantis mecha. She explained her eclectic choice with "The nail-polish class was full..."
Darkwing Duck comic
Gandra Dee's only appearance in any comic book was in the DuckTales/Darkwing Duck crossover story arc "Dangerous Currency". However, since the story was never approved by Disney, it is considered non-canon.
Gandra Dee appears in season 2 of DuckTales (2017). She is portrayed as a punk-rock scientist who doesn't kiss up to millionaires and does her own thing. She is also portrayed as being less stereotypically feminine in this version. Her design has changed from a blond-haired white chicken to a brunette-haired brown chicken. At first she was a spy for Mark Beaks, later in "Moonvasion", it's revealed she's a agent of F.O.W.L..
- Her name is a reference to actress Sandra Dee.