Kastro

Background
Kastro is a prominent fighter in the Heavens Arena and apparent celebrity (as he constantly gives out autographs). He lives on the 200th floor of Heavens Arena with the intent of accumulating enough wins to become a Floor Master. His only loss was to Hisoka, so he trains rigorously to improve his Nen. After gaining nine wins (ten wins are needed to be a Floor Master), he challenges Hisoka to a rematch. Kastro's undoing was in the type of Hatsu ability that he had chosen. Although he was born an Enhancer, Kastro's Nen ability completely ignored his strengths and used Conjuration and Manipulation abilities. An Enhancer's maximum ability in these fields is 60% at best, so Kastro would never be able to use his full potential. His battle with Hisoka was mostly omitted in Nippon Animation's anime adaptation, but nonetheless resulted in his death.

Nen Abilities
Nen type: Enhancement

Enhancement
 * Tiger Bite Fist 虎咬拳 「ここうけん」

Kastro creates a doble of himself that can attack and confuse the enemy it's a combination of Conjuration and Manipulation abilities.
 * Doppelganger 分身 「ダブル」


 * Divine Tiger Bite Fist 虎咬真拳 「ここうしんけん」