-True Name: Killua Zoldyck
-Other Qualifying Classes: Saber, Lancer, Berserker
-Alignment: Chaotic Neutral
-Weapons: His sharp nails and yoyo's
-Summoning Relic: A yoyo
N. Phantasm: B+
-Presence Concealment (B+): The capacity to hide one's presence as a Servant. It is a common skill to the Assassin class. It is possible to disappear completely and become almost impossible to be detected. However, it will shut down once attacks are taken.
-Charisma (B): Killau is an expert to disguise his bloodlust and appear to be native and free-spirit.
-Expert of Many Specializations (B+): Access to and use of many expert skills. Tactics, assassination, hand-to-hand combat, long-distant attack and other skills can be used with proficiency of Rank B or above.
-Fearsome Mien (C+): When he reveal his bloodlust side to his enemy, they instantly feel a spike of irrational dread and loss all
-Immunity (B): His training endowed him with near immunity to poison and high tolerance to electricity.
-Nen (A): As a Transmuter, Killua's most efficient in changing the form of his Nen. Just like Gon's, Killua's talent is said to be absolutely astounding, found only in one out of ten million people. Killua developed a Hatsu in which he alters the properties of his aura to make it similar to electricity. This was inspired and made possible by the years of electric shocks he received as a child, both as training against torture and as punishment from his older brother Milluki. In order to use the ability, Killua needs to charge himself by absorbing electricity through a socket or other means beforehand, although, by his own admission, he runs out of electric aura pretty quickly.
-Shadow Lantern (A): He is able to walk without making a sound and sleep with a larger part of his brain awake than normal, so he can avoid attacks even in his sleep, even if they come from an armed, albeit weaker, fellow Hunter. After leaving Greed Island, due to his prowess in Nen, Killua became able to blend with nature more easily, which allowed him to find multiple new species of animals at a rate.
-Muscle and Joint Control~Assassin Claws
*Effect: Killua can dislodge his joints at will in less than a second, an ability that enables him to escape from most ties. An instance is given when he dislodged his shoulders, elbows, wrists and fingers to free himself from Machi's strings. One of the several assassination arts passed down to Killua through his family consists in adjusting the anatomy of his hand; his fingernails turn into claws that are sharper than knives, with which Killua can sever a limb, a head or even rip out an heart with frightening
-Assassin Mode~Bloodlust Release
*Effect: When employing his assassination techniques, Killua enters a state of mind that helps him channel his strength and concentration for the sole purpose of slaying his opponent, increasing his combat strength. He compares the process to flipping a switch.
N. Phantasm: A
-The Snake Awakens~Whipping Strikes
*Effect: Killua whips his arms with incredible fluidity and speed, cleaving anything that comes in contact with them.
-Thunder Palm~Lightning Shock
*Effect: The first and most basic ability Killua developed. As the name suggests, Killua is able to shock an opponent by touching them with his palms.
*Effect: Killua projects a bolt of lightning from his hand, striking an opponent with electricity from a distance after jumping into the air. While it does not inflict much damage, it is very painful and capable of stunning even targets as powerful as Menthuthuyoupi.
-Godspeed~Lord of Lightning
*Effect: Killua can change the properties of his aura to generate a surge of electricity into his own body, increasing his speed to levels that transcend the limits of his body. When he activates it, his hair, hands and feet glow with electric-like aura and his body starts to give off sparks. Anyone touching him will suffer mild shocks. This ability is very versatile. It can be used offensively to overwhelm the opponent with impossibly quick blows, defensively to block or evade attacks, or both ways at the same time. Due to it, Killua can confront opponents which normally he would stand no chance against, as demonstrated when he briefly managed to overpower two Royal Guards. Should he wish so, he can electrocute the opponent on contact, paralyzing even enemies of Menthuthuyoupi's caliber, or burn off parts of their body by generating an electric current between his hands. However, Killua can transmute only a certain amount of aura; after a while, he needs to recharge himself by absorbing electricity. There are two applications to this Hatsu:
-Speed of Lightning: Killua moves his body according to his own will. It can be used to travel long distances at high speed, or in combat when there is a significant difference in speed and/or power between Killua and his opponent.
-Whirlwind: This form was conceived during the fight against the Ortho siblings. By turning his aura into a field capable of transmitting all electrical impulses in a straight line from his brain directly to the part of the body he wants to use, the nervous system is completely bypassed, which causes his physical speed and reaction time to become even greater. Since this variation is centered on reaction, he can perform only intuitive tasks with it; nonetheless, it can become a frightening weapon if Killua sets himself to attack a target upon perceiving hostility in their aura, or if they step into a preditermined perimeter.
N. Phantasm: A++