Hiroyuki Kudo (工藤ヒロユキ Kudō Hiroyuki) is the main protagonist of Ultraman Taiga and the human host of Ultraman Taiga, Ultraman Titas, and Ultraman Fuma. He is a member of the private security organization EGIS.


Pre-Ultraman Taiga

Hiroyuki as a young child

When Hiroyuki was young, he was attacked by a Lecuum. The alien took Hiroyuki's pet Guesra Chibisuke and took off to his ship but Hiroyuki managed to grab hold of the alien and was pulled into the air by the tractor beam. The alien noticed and shook the child off thousands of meters above the ground. Luckily, he was saved by the light of Ultraman Taiga, who has been dwelling inside him ever since, but without his knowledge.[1]

Ultraman Taiga


While out on a mission with Alien Rivers Kawazu, Hiroyuki hears the voice of Taiga aiding him when he is attacked by Alien Ckalutch and Cicada Human. He chases down an Alien Magma, who has abducted a baby Zandrias to lure out its mother so that Zegun can appear and kill it as a demonstration for a monster auction. Hellberus is summoned by Kirisaki, and it kills Zegun and attacks the Young Mother Zandrias, knocking over the building Hiroyuki was in, while trapping Baby Zandrias under rubble. Hiroyuki's desperate wish to save Baby Zandrias' life is heard by Taiga, who gives him the power to transform and fight Hellberus. Hiroyuki properly speaks to Taiga for the first time after defeating the monster. Buddy Go! Hiroyuki and Homare are dispatched to deal with a giant monster that had been attacking chocolate factories. It turns out to be Chibisuke, controlled by Rekyum Men and modified into a violent King Guesra, who at first recognized him, but went on a rampage because of Kirisaki's influence. After a brief fight with Chibisuke, which he manages to subdue, Ultraman Tregear appears and fights both Taiga and Chibisuke, killing the latter which greatly angers Hiroyuki and Taiga, but they are no match for Tregear. Tregear

Eventually, Hiroyuki also bonds with Ultramen Titas and Fuma. The Tri-Squad continue to protect the Earth along with Hiroyuki and EGIS.

Hiroyuki sees a masked Kirisaki in a mirror inside his dream

As a side effect of Taiga using the Kaiju Rings, his soul starts to get flooded with darkness. As a result, some of it is carried over to Hiroyuki, who had been having sudden, violent outbursts. The other members of EGIS notice and start to worry about him. This was actually part of Tregear's plan to turn Taiga to the dark side. The Power to Protect and the Power to Fight Just after Taiga had fought against Skull Gomora, Tregear took the chance to release the darkness within Taiga, shutting out Hiroyuki, Titas and Fuma in the process. I Can't Hear Your Voice Kirisaki knocks Hiroyuki out using psychic powers. Hiroyuki sees Taiga in the darkness and tries to get him to snap out of it, but Tregear appears and guides him further down the path of darkness, leading him to banish Hiroyuki from inside him.

Hiroyuki, Titas and Fuma save Taiga from the darkness

The EGIS members synchronize their brainwaves using devices to reach out to Hiroyuki, who, with the encouragement from his friends, dispels the darkness within himself, while somehow creating the Tri-Squad-let. With Titas and Fuma, they make an attempt to rescue Taiga. Hiroyuki dives into Taiga's Color Timer and clears the darkness inside him. With the Tri-Squad now reunited, Taiga gains a new form, Tri-Strium. With this new power, he defeats Tregear for the first time. We Are One

At the end of the series, his teammates at EGIS reveal that they always knew that Hiroyuki was host to the Tri-Squad, surprising him. Buddy, Steady, Go!


"Buddy Go!!"

―Hiroyuki's transformation call

"Hero of Light, Taiga!"

―Pre-transformation call

Hiroyuki slides down the Taiga Spark's Ignition Lever to activate it, takes the Taiga Key Holder and scans it, then raises his hand while shouting his transformation call.

"Let's go, Taiga!"

―Pre-transformation call

"Obtain the shining power!"

―Pre-transformation call

Hiroyuki slides down the Taiga Spark's Ignition Lever to activate it, takes the Taiga Photon-Earth Key Holder and scans it, then raises his hand while shouting his transformation call.

"Burning up! Together with my friends!"

―Pre-transformation call

The first time Hiroyuki transforms, he scans the Tri-Squad-let to summon the Taiga Tri Blade. He then spins the wheel on its body and presses on the trigger to transform.

In subsequent transformations, he simply summons the Taiga Tri Blade without having to scan the Tri-Squad-let.

"Wise Man of Power, Titas!"

―Pre-transformation call

Hiroyuki slides down the Taiga Spark's Ignition Lever to activate it. He then takes the Titas Key Holder and scans it, then he raises his hand while shouting his transformation call.

"Ruler of the Wind, Fuma!"

―Pre-transformation call

Hiroyuki slides down the Taiga Spark's Ignition Lever to activate it. He then takes the Fuma Key Holder and scans it, then he raises his hand while shouting his transformation call.

Hiroyuki puts the New Generation Eye in front of his face and presses the button on the side.

Despite being a host to three different Ultras, Hiroyuki can transform as an Ultraman for a maximum of only three minutes because of the strain put on his body.

Powers and Weapons

  • Taiga Spark: Hiroyuki uses this device in order to transform into Ultramen Taiga, Titas, and Fuma.
  • Ultra Taiga Accessories: Hiroyuki's collection of Ultra Items. By using the Key Holders, he can transform into Taiga, Titas and Fuma, while using the Bracelets and Rings to activate special attacks.
  • Taiga Tri Blade: Hiroyuki wields this weapon when he is transformed as Ultraman Taiga Tri-Strium.
  • New Generation Eye: Ultraman Reiga's transformation item.
  • Stun Rod: As an EGIS field operative, Hiroyuki carries a handheld electrical stun rod as a weapon.

Collectibles in Possession

Key Holder Type Ultra Taiga Accessories

Bracelet Type Ultra Taiga Accessories

Given to Hiroyuki by the Tri Squad, which were in turn all received from the respective Ultra Warriors. When used, these bracelets allow any of Hiroyuki's 3 Ultras to harness the power of a respective predecessor in his energy attacks.

Ring Type Ultra Taiga Accessories

Collected after each monster's defeat.


  • Hiroyuki holds the record for greatest number of Ultras for a single human host.
  • Starting from episode 11 and onwards, all of Hiroyuki's Ultra Taiga Accessory scanning scenes were slightly extended.


Human Hosts and Forms
Showa Hosts Shin Hayata | Dan Moroboshi | Hideki Go | Seiji Hokuto | Yuko Minami | Kotaro Higashi | Professor Ohtani | Shuuhei Aragaki | Tetsuya Kitajima | Tadao Nambara | Takashi Ueno | Gen Otori | Choichiro Hikari | Kyoko | Takeshi Yamato | Ryoko Hoshi | Scott Masterson | Chuck Gavin | Beth O'Brian
Heisei Hosts Jack Shindo | Kenichi Kai | Masaki Kazamori | Genki Kagura | Mysterious Girl | Shin Kenmochi | Agent Sean | Masato Usami | Katsuto Asahi | Daigo Madoka | Tsubasa Madoka | Amui | Ikuru | Yuuto Tamaki | Kazuma Asuka | Shin Asuka | Gamu Takayama | Hiroya Fujimiya | Takeshi Yoshioka (Hyperspace) | Ginga Yumeboshi | Musashi Haruno | Julie | Shunichi Maki | Jun Himeya | Ren Senjyu | Nagi Saijyo | Kazuki Komon | Kaito Touma | Ikuo Hasunuma | Mirai Hibino | Kazuya Serizawa | Ryu Aihara | Shingo Sakomizu | Jin | Run | Shin Moroboshi | Nozomu Taiga | Hikaru Raido | Sho | Daichi Oozora | Akiko Fuji (Ultraman F) | Gai Kurenai | Riku Asakura | Leito Igaguri | Katsumi Minato | Isami Minato | Rosso | Blu | Asahi Minato
Reiwa Hosts Hiroyuki Kudo | Haruki Natsukawa
Evil Ultra Hosts Keigo Masaki | Riko Saida | Shinya Mizorogi | Hiroyuki Misawa | Mitsuhiko Ishibori | Arie Ishikari | Makoto Aizen | Kirisaki
Other Hosts Takeshi Hongo | Kyotaro Kagami | Officer Sakomizu | Goro Kirishima | Yuji Hayase | Tetsuo Hayase | Lily Hayase | Daisuke Misaki | Naoki Tachibana | Koh | Ai Tachibana | Zen Tachibana | Toki Goh | Naoto Sho | Takeshi Todo | Ippei Baba | Yuka Inoue | Mai Midorikawa | Sam Collins | Ai Kumashiro | Akira Kageyama | Rei | Nao | Tomoya Ichijouji | Daisuke Misaki (Glenfire) | Amate | Yuta Hibiki
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