There are no Harpy enemies... yet... (let's hope)
But if you'd like to see the Bat-girl enemies, go to the bottom of the cave & instead of going left of the save, (where all the mushroom girls are) go right, that area is unlocked as of the latest version as of writing this.
you'll see a crystal-like cave where all the bat girls are.
Actually? Here's another question, What does the Warewolf boss look like?
View attachment 1216352
Does anyone here know?
(Please oh please tell me it's a warewolf GIRL, rather than some wolf man...
or wolfish beast...)