|Planet of origin||Planet Eternium|
|First appearance||"The Day the Earth Stood Stupid" (3ACV07)|
|Voiced by||Tress MacNeille|
Fiona is one of the Nibblonian leaders who helped Philip J. Fry and Turanga Leela save the Earth from the Brain Spawn. She can be told apart from other Nibblonians with the bow on her eyestalk and the lack of fangs. Like most Nibblonians, she hates being called cute, despite enjoying to be petted. During the Brain Spawn Invasion of Earth, Nibbler confided in her that he feared the Nibblonians are cute. Fiona replied "Oh, niggle-snoosh!", paradoxically refuting and confirming Nibbler's fears.
Fiona: Do not be afraid my child.
Leela: I'm not afraid.
Fiona: Good, good.