Mary Auden is a supporting character from the anime Let This Grieving Soul Retire, appearing primarily in the second cour of the series as well as in the original light novels and manga. She is a childhood friend and fellow mage of Artbaran Henning, with whom she is almost always seen acting together. Mary is a member of the party known as Hidden Curse. Physically, she is described as a young woman with long blonde hair, large green eyes, and smooth, unblemished skin. Her typical attire includes a purple capelet with a bowtie, a white collared shirt, a purple pleated miniskirt, white thigh-high stockings, and brown knee boots, often accented by a red belt and a purple hair ribbon.

Her personality is not extensively detailed in the available materials, but her consistent companionship with Artbaran suggests a loyal and dependable nature. Her motivations appear centered on supporting Artbaran in their adventures, and she shares a close bond built on their shared history as childhood friends. As a magic user, she contributes to her party through magical abilities, though specific spells or techniques are not explicitly described in the search results. Mary Auden does not undergo significant on-screen development, remaining a steady presence within the narrative. Her role is that of a reliable ally and mage within the Hidden Curse party, and her relationship with Artbaran is the primary anchor of her character.