Wendy is a slender teenager with blue eyes and curly blond hair that extends to her upper back. She wears a white long-sleeved shirt under a blue one, short jeans. She also wears a purple hat, with a curl of blond hair on her forehead escaping from underneath. After her incident, she took to wearing an inhibitor collar around her neck.
Wendy stood at the back of a room in the Meta-Human Youth Center, watching Eduardo Dorado Sr. explain how the Center worked. When she turned to leave with a scowl, she was stopped by Eduardo Dorado Jr. who convinced her to stay before he teleported on stage. She then took a seat and, with a smile, watched Ed and his father finish the speech.
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In the center, Wendy and three other female meta-teens debated the purposes of the inhibitor collars. Wendy told the others that collars were for pets, and that she would never put one on.
Wendy was put in a group with Mist, and Livewire and to work on controlling their powers, supervised by Eduardo Jr. and his father. When Wendy heard her companions give themselves "hero names", she decided to call herself "Windfall". After that, she activated her powers, but accidentally drew Mist (in her mist form) into her small tornado, causing Livewire to zap her to save Mist. Angered at being called a brat by Livewire, Wendy lost control of her powers and accidentally sucked all the air from the room, so Ed teleported her out of the center. Outside, Wendy broke down into tears, calling herself a monster while Ed comforted her.
Back in the meeting room, Wendy sat in a chair glumly, wearing the collar she previously refused to wear, while Ed looked at her sadly.
When the Outsiders arrived with more meta-teens, she overheard Ed state his desire to join the team. She congratulated him on his new endeavor and showed the recent news reports on the popularity of the Outsiders.
Windfall was coerced into becoming a villain by her sister New Wave, and together they were part of the Masters of Disaster. This mercenary group helped Baron Bedlam take power in Markovia, though she defected in search for redemption. She joined Suicide Squad and was killed during a mission against Chemo.
This is her second animated appearance. She first appeared in the Thunder & Lightning shorts in the DC Nation block.