Vivian Spencer

Vivian is the captain of Saint Patrick Academy's equestrian club. She is known as the queen of horseback riding because of her outstanding performance in horsemanship and is admired by her peers. Strict and exacting, she is a gifted equestrienne and is aiming to get the Lady Crest. She is the former rider of Andrews and current rider of Elizabeth. Threatened by Lynn's popularity when she managed to tame Andrews, Vivian makes sure to be harsher to Lynn. Her feeling of dislike for Lynn is further fueled when she notices that Edward is more interested in Lynn than in her. She allied herself with Mary, who also resent Lynn for ruining her mother's marriage arrangement and to become one of the nobility classes After the accident, Vivian's attitude towards Lynn gradually changes and began to accept her and even support her in her struggles. She is often accompanied by her two assistants.

Source: Wikipedia.