Mary is a young girl with bushy, bright red hair that reaches just past her shoulders. She has two short strands of hair on her forehead, along with a couple shorter ones. Mary's eyes are sharp blue, and she always has a bright expression.
Her fashion choice includes, short skirts, long shirts, cartigans, over-the-knee stockings, sweaters, and cute sneakers, or brown laced boots. Her sleepwear consists of a light-yellow shirt-dress that reaches the knees.
Mary is a strongheaded and witty girl, stubborn and loud. She tries to help out when she can, but due to her clumsiness, is often let go. She has a lack of perception, and is quite teasing at points. She hated her hairstyle at first, but gradually accepted it.
- Mary has similar red hairstyle of Ponyo.
- Her persona holds similarities to Kiki as well as both sharing a similar storyline.