Fellow guardian in the fight against the stray Blazers. Daichi first encounters him after defeating Yuuma, who Shirou mistakes him for. After Shirou and Daichi have a short battle, they collapse, but are found by Tamaki. They discuss the origins of mystickers before beast interrupts Thanks to a combined effort and the help of new mystickers Daichi and Shirou defeat Beast. Then Shirou and Tamaki leave with the Testarossa mysticker. Shirou becomes Daichi's rival. Shirou has a cold manner at first, but he is a kind person and is an honest Blazer. Shirou initially fights using the Valiant mysticker, a gauntlet-like weapon. He usually but later finds prowess with the Testarossa mysticker, a flaming sword. That suits him well since he good a melee combat, and is a fire-type user.

Alongside Tamaki, Shirou is a main character in the DS video game Blazer Drive where he fights against the villain Albert.

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