Chris Riddell. Portrait of a character of his, not quite as caricature style as his others but has a hint as the eyes are similar. Like how it's framed in a not quite symmetrical frame, uses cross hatching to create depth in the background. Like how he uses one colour and it's bright but subtle as only used in one area.
Here is Chris Riddell’s Ada Goth, star of the series of books Chris writes and illustrates which include Goth Girl and the Ghost of a Mouse, Goth Girl And The Fete Worse Than Death and his special World Book Day offering Goth Girl and the Pirate Queen. Ada is based on a real person, Lord Bryon’s daughter Ada Lovelace