It's nearly impossible to imagine the future queen raising her fists to deck someone, but according to Crawford's book, The Little Princesses: The Story of the Queen's Childhood by Her Nanny, Elizabeth and Margaret had a normal sibling relationship that involved some intense fights. She wrote, "These were two entirely normal and healthy little girls, and we had our difficulties. Neither was above taking a whack at her adversary if roused."
In the royal documentary, Arbiter also acknowledged that the sisters remained close and supported each other. She said, "There’s some lovely archive footage of Elizabeth and Margaret when they were growing up. It really speaks to the close relationship they shared and you can understand why. They didn’t go to regular schools, they were each other’s best friend."
She continued, "Elizabeth was quite happy for Margaret to be the center of attention because she said, ‘If Margaret’s there, she makes everybody laugh.’ And so it took the pressure off Elizabeth, who perhaps was more introverted compared to her mischievous sister."
Fortunately, their tight-knit relationship continued well into adulthood, even despite their different personalities. According to Vanity Fair, there was a direct line between Buckingham Palace and Kensington Palace, which allowed the sisters to speak whenever they wished.