Caledonia is the codename of Alysande Stuart, Captain Britain of another universe who was brought to Earth 616 by Johnny Storm during Chris Claremont's run on Fantastic Four, showing his attachment to characters and situations from his days on Excalibur. This Alysande Stuart was a Scottish warrior, hence how her costume looks more like the Cross of St. Andrew rather than the Union Flag that the mainstream Captain Britain tended towards.
This image is a copy of a shot of her done by Carlos Pacheco. I'm most in favor of the shadings I did on the cape and on the white bits, giving the image some depth without overuse of blacks. I think my least favorite bits are mostly stuff that were brought over from Pacheco's style in general. He's not my favorite artist out there, no. He's good, don't get me wrong, but there are others I like a lot more.