Asia looks like a pullet. She'll be pretty when mature with that blue-grey.
Keep the roo with the girls, eat the fertile eggs. No one on this earth can tell a fertile egg once it's cooked, and only a practiced eye can tell when it's raw. No taste difference, and if you collect eggs regularly--and I mean at like every other day, not like four times a day--you won't get any incubating.
If your ee roo covers a buff orp hen, you'll have a mixed breed chick. It's fine to mix breeds, folks do it all the time with many different animals.