it's too bright and obvious for Huntress, not something to be worn at night or that you could ever properly stalk someone in
...but it's pretty!
Actually though, what really made me think it fit Helena was that issue Bedard did where she ends up driving a school bus briefly. Purple is dark enough that she can blend into the shadows if she wants to, and she can certainly be intimidating when she wants to, but if she is saving kids and acting friendly, the costume itself would not scare them. (Which is a contrast to Batman's, given that his costume and overall look still has the potential to scare kids even if he's not acting scary.)