Mirei Minae leads Team Daybreak as a formidable blind cardfighter, wielding textured stickers on card sleeves to navigate battles through touch and an encyclopedic memory of game mechanics. Born into the Minae family, she believed her brother Nadatsugu (Danji Momoyama) dead until a chance festival encounter shattered the lie, exposing years of familial deceit and sparking a crisis of betrayal. Publicly, she embodies a cheerful, idol-like persona through curated streams, masking profound insecurities tied to societal judgments about her blindness and the isolating weight of leadership.

Her philosophy of solitary kingship, drawn from childhood tales, once drove her to dominate rival Vanguard teams by burning their banners—a strategy later abandoned to shield groups targeted by Team Blackout. Enhanced hearing allows precise tracking of opponents’ moves, though chaotic noise disrupts her focus. She commands the Dragon Empire’s Armed mechanic deck, anchored by Sealed Blaze Maiden, Bavsargra, and adaptable weapon orders for swift tactical shifts.

Interactions with Yu-yu Kondo challenge her self-reliant dogma, culminating in a Nagoya Castle rematch where she embraces teamwork over solitary rule. Post-revelation, she apologizes for past aggression, mending ties with rivals. Later arcs show her mentoring Urara Haneyama against the Uniformers and grappling with concern over Danji’s prolonged absence in America, seeking to rebuild their fractured bond.

Outside combat, she favors sweets, scented nail polish, and teddy bears, while avoiding loud environments. Recent hobbies include nestling into plush cushions—a quiet indulgence contrasting her disciplined exterior. Tournament ventures yield moderate success, often stalling before semifinals, yet her strategic legacy endures.