Here we see the red-faced Miserable Aunt Bertha turning to green with sickness when she has gorged upon too many chocolates, with the living room itself going green to emphasise the fact.
Interpreting facial expressions and body-language is important to get right – the main protagonists, as well as those who may be reacting and looking on. I use my own facial distortions, using a mirror, to get such expressions.
The question ‘who’ is a business of considering the nature and action of the characters who are participating in the narrative.
Here we have to interpret, not just what they are doing, as far as their action is concerned, but register their physical appearance (features of face) and their momentary gesture and expression.
It is rather like directing actors in a play - trying to create characters in the illustrations who react to each other and who have an intense involvement in what they are doing, so that they generate a sense of believability for the viewer. Maintaining the likeness of a character in a sequence of illustrations is always a test.