Kite Tenjo

Kaito Tenjo is a Number Hunter in Yu-Gi-Oh! ZEXAL. He was originally a nice person, but when his brother Haruto Tenjo fell sick, Dr. Faker told him that it was due to the Number holders and the Astral World, thus Kaito turned evil trying to seek out the holder of The Emperor's Key which would lead him to Astral.

Manga
Kaito is a Number Hunter who was sent by his adoptive father, Dr. Faker from a different dimension in order to gather and destroy all of the Number cards as they are destined to destroy not only his universe, but all universes.

When Kaito first appeared in Heartland, he set straight out on his mission to find the Numbers cards, even by attacking and Dueling strangers in order to find them. He was shown to quickly defeat not only an unknown Duelist, but Tetsuo who he then quickly used as a sacrifice to entice Yuma Tsukumo in to a Duel in order to obtain his Number cards and destroy them. Angered by this, Yuma accepts, unlocking Astral to assist him in the duel.

During the Duel, Kaito quickly gains an advantage by Summoning his "Photon Wyvern", destroying all of Yuma's monsters and attacking him directly taking him down to 1500. Yuma quickly fights back by Summoning "Number 39: Utopia", but seeing this as a threat, Kaito sends an explosion out and runs away as he was only testing Yuma's power.

Unlike any other regular D-Pad version of a Duel Disk, his disk is a blue and single-bladed disk that curves outside, and he is seen Dueling without a D-Gazer in the opening, however his eye turns red and several marks resembling a D-Gazer are seen when he duels.

Anime
In the anime, Kaito uses a Deck focuses around the LIGHT attribute, to swarm monsters which he can then use to Xyz Summon his Numbers.

Manga
In the manga, Kaito's Deck seems to be more centered around the "Photon" archetype, whilst supporting them with the various Number cards he has obtained by beating Duelists.