Mistrals is a rare item hunter who collects items with "Rare" in their descriptions. She has an unusual sense of smell that triggers around such items. However, she does not tolerate hackers who create their own rare items as it would make her job less authentic. In real life, Mistrals is the 4-year-old daughter of a child prodigy with an IQ of 200. Her avatar resembles her mother but has a name change. She is classified as a Wavemaster subclass "Rare Hunter" and calls herself "The Rare Item Hunter of Love and Justice." In each anime episode, she says the phrase "rare item" at least once, reflecting her obsession with them. Mireille, who shares the name of one of the protagonists from Noir, also produced by Bee Train, sometimes has a covetous eye on the Twilight Bracelet.