Gosalyn Mallard, originally Gosalyn Waddlemeyer, is a female anthropomorphic duckling.
An orphan, Gosalyn was raised for a time by her grandfather Professor Waddlemeyer, inventor of the Waddlemeyer Ramrod. Unfortunately, the crime boss Taurus Bulba sought to claim the Ramrod for himself, and his men stole the device and killed her grandfather. They later came after Gosalyn believing that she knew the activation code for the machine, only for Darkwing Duck to come to her defense. The pair bonded during their harrowing adventure, and after Bulba's defeat Darkwing-in his alter ego of Drake Mallard-adopted Gosalyn.
On various occasions, Gosalyn has adopted various crime-fighting and/or costumed personas while involved in her father's exploits. These have included the Crimson Quackette and the archer hero Quiverwing Quack. She briefly became the plant-based supehero Yucky Duck due to an experiment of Bushroot's, and later played the part of the supervillain minion "the Grub" after being deceived by the Bugmaster.