No doubt you can be close to someone who's very different from you. Ginger is excitable; she leaps into action, throwing herself headfirst into any project. Chrysanthemum is cooler-headed; she likes to plan, she's organized. She makes lists. Yet they are cousins, close as two beans in a pod.
But planning Grandma's birthday together is a pretty huge challenge. There are presents to buy, decorations to pick, and a special birthday cake to bake. Together. How they manage it is a testament to affection being stronger than differences.