Like more than a few Supers, Elliot chose her crime-fighting ways, she simply didn't choose her powers. I always liked it when there was a 'Home-made' effort to a symbol or costume. A crappy 'Trial' version outfit before the Super-suit comes into the mix. Magpie is no different- even sporting a metallic baseball cap with 'Lady Luck' scrawled on it, a nickname soon associated with the hero during her first year 'on the beat'. The theme of 'Magpie' is established story-wise so the colours she wears still reflect that. A younger less experienced Ellie sports the suit, body language suggesting more storm than calm, less elegance and experience.
The Super-suit itself hasn't changed considerably from the original designs. Elements like the belt(complete with shiny keys and locks, to further suggest the theme) have been removed in favour of flexibility(was unable to pose her in the very 'acrobatic' manner I want her to move.) And flared trousers too, trimmed to support the acrobatic feats. Also, to contradict earlier designs- the black on her suit is of a Matte surface, not a shiny 'glossy' one. Also for no real reason, her tail coats seem to get even longer each time I draw her.