The statement that is not true about the madrina in a traditional Spanish wedding is: "She accompanies the groom to the wedding."
In traditional Spanish weddings, the madrina is typically associated with the bride rather than the groom. The madrina often plays a mentor role, supports the bride, and may sign the marriage license as a witness. She usually wears a formal gown and may give a speech about the couple, but she does not accompany the groom.