mahou shoujo who simply are

[tsukikage]

Can anyone think of any examples of magical girl anime where the girls simply *are* magical girls, rather than having been granted their powers or somehow having stumbled across it? (Come to think of it, I can think of series where someone was granted their powers as a result of a chance event, but none where they actually stumble across the powers ala Death Note. Is that more of a shounen thing?)
Seriously, though, for all the weaknesses in storytelling and plot, varying by incarnation, I think I'll always love the sort of... timelessness... contained within Sailor Moon folklore. If that makes any sense whatsoever.