Kalluto Zoldyck is a younger sibling of Killua and is the youngest child of the Zoldyck siblings.
Kalluto has a silent and obedient personality, often seen doing what s/he's told. It was later revealed that s/he can be a bit of a sadist after his/her battle with a Chimera Ant and says that s/he was used to enduring the pain.
Like another child of the Zoldyck family Alluka, it is not sure yet whether Kalluto is female or male. Though s/he wears a kimono, typically a woman's dress, s/he refers to himself/herself with the pronoun boku (ぼく or 僕), a term primarily used by Japanese males in real life. However, it should be noted that boku can be used by manga female characters when manga authors want to describe the toughness or masculinity of these characters. In the English dub of the 1999 anime adaptation, Kikyo introduced Kalluto to Gon and his friends as a young lad, but this is not canonical. The same scene in volume 5 of the Japanese manga version has her simply saying "This child is Kalluto" (この子はカルト -- Kono ko wa Karuto) with no indication of gender. The official HxH guide book seems to state that Kalluto is a young boy (shounen) who wears kimono, but this is not a definite evidence and is up to interpretation because right after the word shounen there are an exclamation mark and a question mark next to each other in parentheses: 「着物少年(!?)」. According to the manga's creator Yoshihiro Togashi, Kalluto's design was inspired from Hotaru Tomoe from Sailor Moon.
Kalluto is first shown after Gon was chased by Mike the Zoldyck family guard pet, but s/he was initially introduced accompanying his/her mother during Gon's retrieval of Killua from Kukuroo Mountain.
Kalluto appears again during the Phantom Troupe arc, Where Maha and Kalluto assisted Illumi with the assassination of the ten mafia dons that had placed bounty on the Phantom Troupe's heads. S/He also used himself/herself as a decoy to help Illumi switch places with Hisoka (who hired Illumi so that he could do battle with Chrollo) in the Spiders' hideout.
After the Phantom Troupe's entrance into Greed Island in search for a nen remover, Kalluto was introduced as Hisoka's replacement and it was his/her abilities that led them into finding the nen remover.
Chimera Ant Arc
During the Phantom Troupe's assault on Zazan's palace in Meteor City, s/he reveals he joined the Spiders with the intention of finding his missing older brother Alluka. He was left in awe in the phantom troupe's combat proficiency and admits his/her skills are still lacking compared to them.
Kalluto has the ability to manipulate paper, using a paper fan and confetti as a weapon.
- Surveillance Paper Dolls
- Paper Fan blade
- Dancing Serpent's Bite