Miyako is Maron and Chiaki's classmate who lives across the hall from Maron. Miyako is the child of parents who are detectives, and thus Miyako is always trying to catch Jeanne. She says the reason of catching Jeanne is to prove Maron's innocence because half a month before the beginning of the series people in their class were saying Maron looks and talks just like Jeanne. In the anime, Miyako does not know that Maron is really Jeanne she tries so hard with tricks and plots that are rather dangerous to Jeanne just to catch her. She causes a lot of trouble for Jeanne and her mission. Miyako does not know about Maron's true self until the end. However, in the manga it is different. Miyako says that she knew Maron was Jeanne from the beginning, and saying that the reason she was in Jeanne cases was if Maron was caught, she could just say it was a mistake. She is madly in love with Chiaki, but gives up on him since he is more interested in Maron. She is stubborn and is exactly like Maron. She usually gets mad every time Jeanne escapes. After Yamato tells her about his feelings for her near the ending, she gets mad, thinking he's playing a sick joke, and neglects him. However, in the manga, she married Yamato Minazuki and has a son named Shinji (the reborn form of Access).     (Source: Wikipedia)

A normal looking high school girl on the outside, Kusakabe Maron is actually the reincarnation of Jeanne d' Arc. With the help of the angel, Fin Fish, Maron works as the thief Jeanne at night to seal the demons that reside in pieces of artwork, preying upon the weak hearts of the owners. She is branded as a thief due to the fact that the artworks disappear after she seals the demons. One day, a new neighbor and classmate appears, as well as a rival in her night job, the thief Sinbad. With her own best friend being the detective's daughter, out to capture her and the appearance of her new rival, Maron's work is anything but easy.

High school student Maron Kusakabe has a secret: she’s Phantom Thief Jeanne. She sneaks into private art collections to steal paintings in which demons reside. Jeanne’s task is to seal the demons before they can devour human hearts. So far she’s been able to evade the police on her midnight outings, but now another thief has come onto the scene—Phantom Sinbad—and he’s trying to take the paintings before she does!
 
(Source: Viz Media)
 
 
Notes: 
- Includes bonus stories "Miyako☆Catharsis", "Instant?! Access Legend★", "Let's Go, Silk Road ★"
 
- "The Memory of the Fish, The Snow Crystals of the Moon" 1-2 and "I Will Be Your Happiness" are not included as they are only released in the Bunko edition (but not in the initial release of the manga)

Miyako Toudaiji