Kiriko

Kiriko (キリコ, Kiriko) are Magical Beasts that can change their own physical appearance.

Hunter Exam arc
A family of Kiriko outside of Dolle Harbor serve as navigators to the examination site for the Hunter Exam. During the 287th Hunter Examination they used their shapeshifting abilities in order to pretend to be a human family under attack by Kiriko in their natural form to test Gon, Kurapika, and Leorio. They are impressed with Gon's superhuman senses, Kurapika's knowledge of ancient symbols, and Leorio's kindness and skill in treating the supposedly injured man. Because of this they agree to take the three to the site of the hunter exam.

Greed Island arc


They later guide Killua to the examination hall during the 288th Hunter Examination upon learning of his friendship with Gon. They are very eager, at that time, to hear of Gon's adventures, sighting the fact that they "miss the lad."

13th Hunter Chairman Election arc


The Kiriko Son poses as Gotoh after his death, possibly so that Killua won't know that he was killed.

Trivia
In the English dub of the 2011 anime Tom Fahn voices the Parents, Kyle Hebert voices the Son, and Deborah Gatton voices the Daughter.