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. There's a robot that accompanies Kaito which is known as Orbital 7.

Design
Unlike any other regular D-Pad version of a Duel Disk, Kaito's disk is a blue and single-bladed disk that curves outside. He can duel without a D-Gazer, however his eye turns red and several marks resembling a D-Gazer are seen when he Duels. When Kaito duels, his black outfit switches to white in a process called, "Duel Mode, Photon Change". This is possibly the reason why Kaito isn't affected by Numbers' effect that increase the amplitude of the users' desires.

Personality
Kaito shares a similar personality to that of Seto Kaiba when it comes to protecting its younger brother from any danger. Because of Haruto's illness supposedly being caused by the "Number" cards, is that Kaito Duels and acts ruthlessly when it comes to facing those whose possess such cards. As a direct consequence for this is that Kaito doesn't care that his opponent suffer the consequences in which the same ages when it is relinquished from the "Number" it possess because of Kaito's own doing. He announces his arrival by whistling.

Anime
Kaito's brother, Haruto was very ill. Dr. Faker informed Kaito that he could only be cured if they obtained the one hundred "Numbers" cards. Faker himself claimed that they must do so to save all dimensions. Kaito was partnered with a robot called Orbital 7, who had the ability to pause time. Using Mr. Heartland's penthouse as a base, they find and defeat the holders of the "Numbers". Thus far, he has obtained eleven "Numbers" using his Photon Hand ability, stealing the souls of the original owners in the process. He wields the "Numbers" himself to aide him in collecting more of them. Kaito was worried about stealing the souls of the holders, but Heartland informed him that it didn't matter, as all "Numbers" holders are evil anyway.

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.

Abilities
After he wins a Duel with a "Number" user, Kaito uses his "Photon Hand" which enables him to grab the "Number" card from their users and aging the former owner significantly. During that action, he takes their soul too.

Kaito possesses an "Duel Anchor" which he uses to prevent a "Number" user from running away, until a Duel requested is over.

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. So far he collected 11 "Number" cards, but only 3 of them are known by name.

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.