Every bit his sister Mary's equal, in both sarcasm and vulnerability. He also suffers from depression, but not as bad as she. He's a famous essayist and writer, known for his wit, which masks a deep, ever-fresh pain. He and his sister are best of friends, as well as co-authors. He also hates and loves his sister in equal measure--he's so tired of taking care of her, he's terrified of what she's capable of, and he cannot imagine a life without her. Must have a fantastic British accent.