Mirei Minae is a young cardfighter introduced in Cardfight!! Vanguard overDress who continues to play a significant role in its sequel, Cardfight!! Vanguard will+Dress. Despite being blind from birth, she possesses exceptional talent in the card game, demonstrating remarkable strategic ability and memory. She is the current heir of the Minae family, a respected lineage, and leads a team known as Team Daybreak. In addition to her competitive pursuits, Mirei is a popular online streamer, gaining a following akin to that of an idol.

Her personality is marked by confidence and fierce ambition. She is driven by a clear goal: to have Team Daybreak conquer every Vanguard team in Japan. This ambition places her in opposition to the main protagonists, making her a major antagonist during the early seasons of the series. She is calculating and determined, using her exceptional skills to dominate opponents and assert her team's superiority.

Within the story of will+Dress, Mirei serves as a rival to Yu-yu Kondo and other central characters. Her key relationship is with Yu-yu, as he eventually redeems her from her antagonist role. This redemption marks a significant development for her character: she begins to move beyond her rigid ambition and acknowledges the value of friendship and fair competition. Her interactions with her own team members also evolve, showing her growth as a leader.

Mirei's notable abilities center on her proficiency in Vanguard despite her lack of sight. She compensates through acute hearing, tactile memory, and deep knowledge of the game, which allows her to predict opponents' moves and execute complex strategies. Her leadership skills and charisma make her an effective team captain and a compelling public figure.