I think she's a PK. Her tail isn't shaped like a VT at all, and her anal fin looks like a PK too.
She's very cute.
My first female had very short triangular ventrals, but the female I have now has much longer ones. I know she's a female, though, because she has an egg spot and because of the shape of her dorsal fin. It's like a sail boat. hehe. Both of my girls were similar to yours at first- scared of everything. Lila would even get stress stripes if I moved too fast! I think the females are generally more nervous for some reason, and it takes a little longer for them to settle in.