Petra
maid and confidante in Stephen Sondheim's "A Little Night Music"
Petra Arkanian
character in Orson Scott Card's Ender's Game series.
Petra Hoffman
minor character on Australian TV show "Dance Academy"
Petra Taylor
character on British soap "Brookside"
Petra Ral
fictional character in the Japanese anime and manga series "Attack On Titan"
Gerda
character in Hans Christian Andersen's "The Snow Queen"
Gerda Solent (née Torp)
wife of the eponymous history teacher Wolf Solent in J. C. Powys's 1929 novel "Wolf Solent"
Gerda Mannheim
German refugee in "The World in the Evening" (1954) by Christopher Isherwood
Gerda
character on Dutch TV's "Sesamstraat"
Queen Gerda
character in the tv show Once Upon a Time