How does Orwell uses Mollies characterzation to forshadow her dissaperance?

Her personality is superficial and adolescent. For example, when she arrives at the big meeting in Chapter 1, Orwell writes, “Mollie … Came mincing daintily in, chewing a lump of sugar. She took a place near the front and began flirting her white mane, hoping to draw attention to the red ribbons it was plaited with” (27). Mollie is the only animal not to fight in the Battle of the Cowshed, instead hiding in her stall. She eventually flees the farm and is last seen, bedecked in ribbons, eating sugar and letting her new owner stroke her nose. We know from the start that Mollie is not interested in revolution or a greater cause, she just wants the easy life.