- "I’ve lost all faith in this world of ours and my legacy. We both know Francis isn’t the man you are. Regard to him for me, and our family, and our good name."
- —Charles's request to Ross Poldark
Charles had two children by his late wife, named Francis and Verity Poldark. He was disappointed in his son since he believed Francis lacked the will and drive to carry on the family name and wealth. He had long hoped he would be more like his nephew, Ross Poldark.
He was very close to his daughter, who he relied upon. Verity was a spinster, which Charles would mock. In 1783, he was delighted at the engagement of his son to Elizabeth Chynoweth.
Charles was shocked when Ross returned home from the Revolutionary War, having believed he died. He was worried his return would ruin the engagement, as Ross was previously engaged to Elizabeth himself.
He tried to bribe Ross in the hope he would leave Cornwall. However, Ross refused and stayed in Nampara. In 1784, Charles became a grandfather when Francis and Elizabeth had a son, Geoffrey Charles Poldark.
When his daughter, Verity, fell in love with a captain of the navy, Andrew Blamey, he was unhappy with the match. He knew of Blamey's troubled past, and he and Francis tried to persuade Verity not to pursue him, which led Blamey to leave Cornwall.
When Charles became unwell, he confided in Ross of his worry that Francis would lead the family, their land and their mines to ruin. He made Ross promise to keep keep an eye on things, believing he had the talent uphold the family name. He passed away shortly after, in 1786.