EhLeeSee, Our New Friend

We tried to buy a house with a Koi Pond and didn't get it, but at closing the buyers and sellers gave us the Koi! I took off a week, catching them and transplanting them to different locations. I wish they could've been together. But here's the grandmother fish. She was leader of the pack. Is she female? And do Koi have a pecking order or senior fish?