These images are my idea of what the main characters in The Wolf in Winter, The Swan in Summer and The Serpent in Spring look like. All images were made using Artbreeder.
Characters from The Swan in Summer. (Brangianne, who is the main character in The Swan in Summer, appears in a dream in the epilogue of The Wolf in Winter and has been included above, as does Feargus who appears in The Wolf in Winter.)Characters who appear in The Serpent in Spring. (Broichan and Ninian first appear in The Wolf in Winter and have also been included above.)