Introducing shamo pullet to older roo

I have one shamo roo, young, but pretty good sized - nearing his mature height. Got a pullet for him, she is half his size. He is by himself in an outodoor pen, I thought he'd be thrilled to see this gorgeous girl come in but he attacked her and scared her nearly to death. She ran screeching from the pen, and squeezed out through a crack by the gate (we hadn't secured it yet as we were watching).
I have NO experience with a breed of this sort and do not know how to introduce her to him properly. Obviously.
Please help. I have her caged at this time and it's no fun for her at all.
Thanks