Who is Dowager Duchess from Something Wonderful and what is their importance?

The dowager duchess is Jordan's grandmother. She is a tough woman, and one of the most respected in London society. Though she has a cold demeanor, she is full of love that doesn't show often. Jordan is her favorite grandson, and she is devastated when he passes. When she realizes that Alexandra is sincerely in love with him and would have done everything she could to honor him, the dowager duchess decides she wants to help train Alexandra to become a societal success, as Jordan would have wanted.