Charmian Bond was James Bond's paternal Aunt who lived in a small village called Pett Bottom, Canterbury. She became his legal guardian when he was 11 years old, after the death of his parents.
Little is known of Charmian's early years, but she was the youngest of the three Bond children after Andrew and Max. She grew up to become an Anthropologist, and studied cultures all over the world. As a result, her home was full of paintings and other such decorations she had brought back from her travels. She always had music playing, and exotic food cooking.
At one point when James was 11 years old, he came to stay with her while his parents were vacationing in the Alps. Shortly after James went out back to the orchard behind her house, the police came to inform her of the death of James's parents. She then sat James down on an old bench in the orchard and tearfully explained the situation.
After teaching James at home since the death of his parents, Charmian sent her nephew James to Eton College one semester into the year when he was 13 years old. While he was at school, she went to Scotland to look after her ill older brother Max Bond. However, as the year went on, Mac's condition began to decline, so she sent James a train ticket in the mail alongside a note explaining the situation, and had James come to join them.
In the Spectre teaser trailer, an Order of Temporary Guardianship is seen with what appears to be Charmian Bond's signature.