pardon the c&p but! winnie is very much a golden retriever/hufflepuff/chaotic good big bundle of energy and good intentions. she doesn't know how to say no when someone needs her help and thank god she was gifted with super speed or else there wouldn't be enough hours in the day for all the things she dedicates herself to. she's a big goofball and truly does love helping people. she's always dropping by with cheesy compliments and sarcastic responses and puns galore and if she weren't so cute and well meaning, she'd be obnoxious, honestly. which is perfect for being a superhero.
i haven't quite nailed down when she got her powers (a couple years ago? a year or so ago? freak accident what what) but i know she took a break from going to school at ucla to help her grandparents keep their diner/cafe running, and obviously now that she has super speed she has a little more time in the day (although a lot less patience) to help out all over. she was recruited to the alpha society not long after discovering her powers too so she's been part of them for about as long as she's had her powers!