Mrs Cratchit is good-natured and busy
1. Mrs Cratchit works hard to make the Cratchit family happy. The Christmas goose has to be "eked out" to feed the whole family, but the Cratchits greet the food with "universal admiration"
2. Although she thinks Scrooge is an "odious, stingy, hard, unfeeling man", she still drinks to his health, because Bob wants her to and she loves him
3. When Tim dies she's protective of her family's feelings. She speaks in a "steady, cheerful voice" and hides her "weak eyes" from Bob - she doesn't want to add to his worries
Writer's Techniques - The Cratchits are presented as a perfect, good family. Dickens idealises the Cratchits so that his middle and upper class readers would be more likely to sympathise with them than if they were realistic and flawed