is a Japanese tokusatsu series that serves as the 45th installment in the Super Sentai franchise and the second entry in the Reiwa era. Some of the characters also participate in Zenkaiger'''s direct sequel, Avataro Sentai Donbrothers.
Main characters
Zenkaigers
The titular Kikai Sentai Zenkaiger consists of a lone human who leads a team of four from the parallel world of . Later in the series, the team receives assistance from the World Pirates' leader, Zocks, in their fight against Tozitend's regime and the fugitive Stacy once their fight is nearing to a close.
The Zenkaigers utilize a multipurpose firearm for transformation, combat, or to enlarge the robot members of the team. It can also access the weapons and/or abilities of past Super Sentai heroes by scanning a Sentai Gear. Their finisher is the . When enlarged, the robot members can access stronger, mecha-like forms via and summon a giant version of the Geartlinger called the to perform a stronger version of the Zenkai Finish Buster.
Kaito Goshikida
is the leader and sole human member of the team. He is a cheerful young man who is usually easygoing, but dedicates himself wholeheartedly when something piques his interest. Prior to the series, his scientist parents discovered parallel worlds before they suddenly disappeared, leaving Kaito to be raised by his grandmother.
Kaito can transform into the white-colored , . While he is incapable of fighting gigantic opponents, he can initiate the Zenkai Combinations and serve as ZenkaiOh's pilot.
Using the Zenkaiju Gear, Zenkaizer can become the green-colored , , clad in armor based on the Zyurangers' mecha Gouryuzin. In this form, he wields the , based on Gouryuzin's weapon the Mighty Dragon Spear Dragon Antler, gains superhuman strength, and his finisher is the . Like the Kikainoid Zenkaigers, he can also enlarge into as well as transform into the jet-themed mecha, based on Gokai Silver's mecha GouZyu Drill.
Using the firearm, Zenkaizer can summon copies of past Super Sentai members to fight alongside him and perform the finisher. It can also enlarge and transform into the fighter aircraft, in which it can perform the finisher.
During the events of the V-Cinema Kikai Sentai Zenkaiger vs. Kiramager vs. Senpaiger, using the Kirameki Zenkaiju Gear, Zenkaizer can become the , , clad in Go Kiramai Red's armor. During the events of the V-Cinema Avataro Sentai Donbrothers vs. Zenkaiger, using the katana that Don Momotaro summons, he can become clad in Goldon Momotaro's armor and cape.
Kaito Goshikida is portrayed by . As a child, Kaito is portrayed by in episodes 1, 15, 19, and 42 and in episode 40.
Juran
is a bold and energetic red-colored Kikainoid, as well as the oldest of the four robot members, who loves parties and enjoys being the center of attention. He is the first Kikainoid that Kaito recruits.
Juran can transform into the , . While transformed, he wields the and the , based on Daizyuzin's weapons the Dinosaur Sword God Horn and the Mammoth Shield respectively. He can also transform into the Tyrannosaurus-themed mecha, based on Tyranno Ranger's mecha Guardian Beast Tyrannosaurus.
Juran is voiced by , who also voices his great-grandfather . In his human form, Juran is portrayed by .
Gaon
is a passionate and eccentric yellow-colored Kikainoid who does not appreciate the company of other Kikainoids and mechanical beings despite being one of them as he is fond of organic beings. He is the second Kikainoid that Kaito recruits, joining so he can defend all humans and animals from Tozitend. After joining the Zenkaigers, Gaon becomes Colorful's chef.
Gaon can transform into the , . While transformed, he wields the , based on Gao Red's weapon the Lion Fang. He can also transform into the lion-themed mecha, based on Gao Red's mecha Gao Lion.
Gaon is voiced by . In his human form, Gaon is portrayed by .
Magine
is a timid and kind pink-colored Kikainoid who enjoys studying magic and the occult. She is the third Kikainoid that Kaito recruits.
Magine can transform into the , . While transformed, she wields the , based on the Magirangers' sidearm the Magi Stick. She can also transform into the dragon-themed mecha, based on the Magirangers' mecha Magi Dragon.
Magine is voiced by . In her human form, Magine is portrayed by .