This photo of the brood exhibits a fine replica of Milady Lula's normal facial expression.
Actually, looks are deceptive. As Lula is obsessed with animals, she was delighted, not only to be picked as the donkey in the Nativity play, but also to be put in charge of all the other animals. She has no time for the sheep - they are 'thupid'. There were some pigs & mice as well - I won't quibble about mice being present in a stable, but I don't recall a swineherd in attendance.
Her new sense of responsibility did go to her head a little. As - obviously - the donkey's part is a non speaking role, everyone ( especially her teacher, hence the high dudgeon exhibited in the mug shot) was rather surprised to hear the donkey shouting 'GET A MOVE ON!' at Joseph & a heavily pregnant Mary. I don't recall this incident mentioned in any of the carols I've heard - have you?