Celtic knots are addictive and very bad for your health. Really. You know it's bad when you close your eyes and you see interlace patterns everywhere.
I worked on this pretty much once a day for the past week, and all day Friday because I got a snow day. I originally intended it to be an ink wash, but the ink I was going to use was not green, as it was labeled, but instead a bizarre yellowish-weird-with-no-resemblance-to-green-whatsoever. So I opted for green watercolor. I used up rather a lot of it . . .
The color of the scan is a bit off from the original. XP
My brother kind of decided it's supposed to be my character Padraig, so, it's Padraig I guess. He lives in Ireland, so it works.

I'm putting a photo of the pencil in my scraps, in case anyone is interested.

References:


Reference for the castle is a pic of a castle in Scotland, I think, called Tioram castle.
The knots and patterns were inspired by early Irish manuscripts and other medieval Irish art, pictures of which I have in a book on Irish art, oddly enough.