Of course not, that's her standard form. She just wears more sensible clothes and hides her wings, normally.
As a "Final Boss", she should also have a giant, demonic form (but being female, that form would probably have titanic naked breasts at the same time as everything was gray and worm-like...) and then a One-Winged Angel form for when she crosses the Bishoujo Line. (Presumably, also nude, but with a humanoid form, and tons of glowy stuff and lens flares, plus maybe a hundred weapons floating around her or something.)