Mike

Mike (ミケ, Mike) is the guard dog of the Zoldyck Estate.

Appearance
Mike is an enormous hound with white (tyrian purple in the 2011 anime) fur. In both 1999 anime and manga, he is robust and has a pink tongue. In the 2011 anime, however, Mike has a slender body, thin ears, long legs and elongated snout, and long bushy tail. His forepaws resemble that of a human hand rather than a hound's paw.

Personality
He is a hound who has gone through strict training. Mike tries to memorize the stranger's appearance and scent. He shows no emotions and is hard to control. Other than the commands from Zoldyck family members, he listens to no one. The command that the Zoldycks gave Mike ten years ago is still loyally carried out: to kill all intruders. If something doesn't meet the requirement of the command, Mike will even attack its caretaker, without any hesitation.

Zoldyck Family arc


When Gon and company arrive at Kukuroo Mountain, they watch as two bounty hunters force their way inside the property. Zebro the gatekeeper refuses, but the hunters take the key away from him, entering from the small gate. Moments later, a hand emerges from the small gate, taking out the skeletons of the bounty hunters.

The three introduce themselves to Zebro and the gatekeeper acknowledges them as Killua's friends. But when Gon asks if Zebro can take them inside, he warns them about Mike. However, Gon is insistent, and Zebro takes them inside via Testing Gate. Zebro call out to Mike once all of them have entered. Inside, Mike is revealed to be an enormous guard dog. Zebro refers to Mike as a 'perfectly-trained guard dog'. The three are surprised and Gon admits that he is scared.

Trivia



 * Mike is not the only guard dog of the Zoldyck family. During a flashback, there are other two dogs which are the same size of Mike, and another is seen sleeping next to Silva when Killua asks him to free Alluka.
 * Mike is given the last name "Zoldyck" in the musical Hunter × Hunter: The Nightmare of Zaoldyeck.
 * The 2011 anime added scenes wherein Mike looks down on the intruding Blacklist Hunters, with Seaquant among them.