So I'm at a bit of a loss here. There's a Genesis game I remember playing a very long time ago that I can no longer remember for the life of me. All I can remember is:

I vaguely remember some kind of boomerang special weapon.
Some kind of castle level with some really fucking annoying bats.
I think the main character was female.

And no, it isn't Alisa Dragoon or any of the Valis games.

Anyone who can help me with this gets a cookie... it was a pretty fun game, and I'd like to play it again if I can ever remember what the bloody hell it was.