Does anyone know the source/artist?

If you have a pixiv source link, you have take the image ID from there and go to http://www.pixiv.net/member_illust.php?mode=medium&illust_id=<ID> to find the author of the pic. You'll need a pixiv account of course. But since this author doesn't have a non-pixiv site you'll need that anyway: http://www.pixiv.net/member.php?id=2387