Kaito

Kaito was a tall, thin man in his late twenties or early thirties. In the manga and the 2011 anime adaptation, he was thin to the point of being gaunt, with long, wavy white hair that reached his knees.

He had an inverted triangular face, with an aquiline nose, a pointed chin, and large, round, almond-shaped eyes with small hazel-colored irises.

He wore a light blue peaked cap, similar to a beret, a long-sleeved white shirt with a high collar, a sky-blue sash (perhaps an obi) wrapped three times around his waist, black trousers, and brown shoes.

Kaito doesn't know where he was born. At some point in his life, he became a disciple of Ging Freecss, an experience he claims saved him from dying in a stinking alley and allowed him to learn the basics of being a Hunter, including Nen.

Sometime after the birth of Ging's son, Ging brought Kaito to Greed Island, where he secretly had Elena manipulate the system so that if Gon eventually completed the game and used an "Escort" instead of a "Magnetic Force" to try to find him (allowing him to travel to him as part of a party), he would be sent to Kaito.

Kaito finally passed the Hunter Exam; however, Ging set one last obstacle to his approval: he wanted Kaito to catch him. This period was possibly when Kaito met Spinner Clow and Stick Dinner, listened to their pleas to save the mountain that was home to the Small-billed Swan, and financed their purchase.

The lack of leads regarding Ging's location eventually led Kaito to Ging's home on Whale Island, where he met eight-year-old Gon for the first time, as the latter was being attacked by a mother Foxbear protecting her cub. Kaito saved Gon by killing the mother, before beating and scolding Gon because his ignorance had forced Kaito to take the creature's life. He then prepared to euthanize the Foxbear cub, claiming that it would grow up to hate humans and be a danger to them, but Gon stopped him, vowing to raise the cub instead. The look in Gon's eyes prompted Kaito to ask him if Ging was its father, and after hearing that he was, Kaito eventually informed Gon that Ging had not died in an accident (as Mito had told him), but was instead a professional Hunter and also his mentor. Kaito then left Ging's Hunter License in Gon's possession before resuming his search for Ging, letting Gon know that it was the toughest hunt in the world.

Kaito is stern and stoic, sometimes brusque to the point of being rude. Although some may consider him insensitive, he is actually caring and cares for animals as much as they care for people. Kaito has enough experience to always be alert and react quickly, not hesitating even when he had to take a life.

Despite his affection for animals, he didn't hesitate to take the life of a fox bear to protect the naive Gon, who had attracted his aggression. After the incident, he punched Gon to reprimand him for his ignorance, resulting in the fox bear's unnecessary death.