Perhaps because he grew up in the wild, he possesses animal-like senses and physical abilities that surpass ordinary humans. Not only does he have power and speed, but his sense of smell is at the level of a bloodhound, capable of tracking the scent of perfume from several kilometers away. He is characterized by spiky dark green hair like a cactus and clear, round black eyes. He has a soft, kind impression and a relatively small build. However, he possesses enough power to easily defeat several adults. An Enhancer-type Nen user. Closest friends with Killua. Male, 14 years old. Wears green clothes. He has a pure personality in both a good and bad sense (his purity makes him more cruel). Extremely curious. A Chimera Ant with dog ears and a tail. He likes and follows the King. He has almost no memories of when he was human. Squadron Leader.

Male, 14 years old. He was the third son of the Zoldyck family, a family of assassins, but after being eaten by the Queen, he was reborn as a Chimera Ant with cat ears and a tail. A Transmuter-type Nen user (Electricity). A handsome boy with white hair and blue eyes. Wears a white T-shirt over a navy turtleneck. He has an arrogant and cold-headed personality, but is actually a tsundere. He is sly and laid-back. He becomes very playful once he gets close to someone. Despite his lean body, he can easily push weights measured in tons. Close friends with Gon. Possesses calm judgment and incredible speed. Completely immune to electricity and poison. Squadron Leader.

A man in his early 20s. Tall with long silver hair reaching past his waist. He wears a light blue cap pulled down low. Wears a white turtleneck, a gray sash, and long black pants. His default expression is sharp-eyed and stoic. A handsome man with a slim build and a slender face. Calm and cool-headed, he is quick to assess situations. After becoming a Chimera Ant, his sense of responsibility and integrity are directed toward the Queen. Manner of speech: "I see," "Understood. I'll head that way." However, he speaks informally when he gets angry. A Conjurer-type. A Chimera Ant with wolf ears and a tail. Squadron Leader.

Female. Specialist-type. Abilities include "Summoning Nen Puppets," "Doctor Blythe," and "Terpsichora." Like most Chimera Ants, she doesn't look much like an ant except for her joints. She has a human-like appearance with short curly hair, and her ears and tail are like a cat's. Fundamentally possesses a battle-maniac trait. Mostly playful, but occasionally cold and mechanical. Shows extreme devotion and a spirit of sacrifice toward the Chimera Ants (especially the King). One of the King's Royal Guards, extremely powerful. Nickname: Pitou. Follows Meruem.

Male. Evaluated as the pinnacle in terms of specs, combining intellect, physical stats, aura, Nen, and operational ability. Meruem's goal is to reign as the apex of all species in the world. A quite handsome man. Green skin, purple eyes, and sharp features. His personality is pure but cruel and cold-blooded. Considering he is a newborn, it seems to reflect a child's characteristic personality (though he does not have a child's body). King of the Chimera Ants. Emitter-type. However, he has no unique Hatsu of his own; his ability to absorb aura is a natural Chimera Ant trait rather than a specific Hatsu. He has shown moments of self-reflection, even mocking how pathetic it would be if he were born merely to conquer. He questions living a life predetermined as a King and struggles with who he is and what he wants outside of being the King. His catchphrase is "Do not make me repeat myself," which is a sign that he is enraged. It's practically a death flag; in most cases, the opponent is already dead by the time he says it. He is relatively kind to the Chimera Ants.