Shinkawa was a prominent member of the red guild Laughing Coffin, known for wielding the Estoc Thorn Sword—a weapon with a distinctive red appearance. He specialized in poison-based attacks alongside his partner Johnny Black, making them a particularly deadly duo. After Laughing Coffin was defeated during the anti-PK raid, Shinkawa developed a deep grudge against Kirito and the other clearers responsible for taking down the guild.
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