Michiru Hazama, a former Under-20 World Champion cardfighter, holds multiple records as the youngest competitor to achieve this title. His life is consumed by cardfighting, dedicating nearly all his time to honing his skills – even dreaming of intense battles during sleep. He actively pursues high-level fights worldwide, driven by an obsession to grow stronger through combat.

Michiru possesses a unique ability to perceive the "Flames" emanating from opponents' hearts, reflecting their passion, determination, or emotional state during a duel. This underscores his deep connection to cardfighting's psychological dimensions. His link to Team Blackout originates with Broken Ace fighter Kagetsu Yakumo, who informed him of the group and arranged his introduction to key member Danji Momoyama.

After an absence from competition, Michiru returns to contend in the DELUXE tournament, a high-stakes event to crown the strongest cardfighter. He stands among the finalists alongside elite fighters Akina Myodo, Kagetsu Yakumo, and Ruka Miyako, confirming his status as a top-tier contender.

In gameplay, Michiru utilizes a Drajeweled rideline deck, emphasizing synergies with grade 4 units. Key cards include "Hoardslash Dracokid," which searches for high-grade Drajeweled units and provides card advantage under specific conditions. He is also associated with the trigger unit "will+Dress, Michiru Hazama," functioning as both a Front trigger and a shield booster against high-grade vanguards. This card is additionally regarded as "Diabolos Girls, Natalia" for deck-building and effect purposes.