A top fighter in the Heavens Arena and something of a celebrity there, Kastro lives on the 200th floor where he's built a reputation as a skilled martial artist with impressive hand-to-hand combat abilities. He's racked up enough victories to earn the title of Floor Master.
His record took a hit two years back when Hisoka beat him—his only loss so far. Rather than fade into the background, Kastro threw himself into intensive training to strengthen his Nen abilities. He's since strung together nine consecutive wins and is now gunning for a tenth by challenging Hisoka to a rematch.
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