In the anime Black Butler, who is betrothed to be married to Ciel Phantomhive?

In the anime Black Butler, Elizabeth Midford is betrothed to be married to Ciel Phantomhive. Elizabeth is Ciel's cousin and childhood friend, and their families have arranged their engagement to strengthen the bond between their noble households. Despite being initially engaged, Ciel struggles with his dark past and his duties as the head of the Phantomhive family, often finding it challenging to fulfill the expectations of their impending marriage.