Mamoru Anjou, older brother to Tokoha Anjou, stands as an internationally renowned Vanguard fighter dubbed the "Kagero Clan Leader" for his unparalleled command of the clan. His legacy looms over Tokoha’s journey, fueling her battles with self-doubt as she navigates the weight of his reputation.

Specializing in aggressive Kagero strategies, Mamoru’s deck revolves around retiring enemy rearguards and exploiting the Blaze mechanic, anchored by his ace unit, Supreme Heavenly Emperor Dragon, Dragonic Blademaster "Taiten." His tactical ingenuity shines through evolving builds that integrate units like Dragonic Gaias and Gatling Claw Dragon, balanced with critical and heal triggers to adapt to shifting competitive landscapes.

A decorated competitor, Mamoru boasts victories against elite fighters such as Tsuneto Tado, Karl Yamaji, and Shion Kiba, alongside repeated early triumphs over Tokoha. His record also bears defeats—notably against Jaime Alcaraz and Toshiki Kai—underscoring his humanity amid elite status. A defining shift occurs when Tokoha surpasses him in a rematch, cementing her evolution and validating his unintentional role as her crucible.

Mamoru’s narrative takes a dramatic turn when a materialized unit’s attack hospitalizes him, an event that leaves Tokoha psychologically wounded. This trauma amplifies the emotional complexity of their sibling dynamic, with his physical absence and enduring influence persistently shaping her choices.

Though their relationship orbits mutual respect, tension defines Mamoru and Tokoha’s bond. Early comparisons to him drive her avoidance of major tournaments, while childhood cardfights—where his dominance deterred her from challenging him—seed her struggle to forge an independent identity. Over time, their rivalry subtly softens into unspoken mentorship, reflecting a shared history that intertwines conflict with unacknowledged guidance.