This article is about a/an Gurongi in Kamen Rider Kuuga.

Zu Zain Da's tattoo

Zu Zain Da (ズ・ザイン・ダ Zu Zain Da)[1], otherwise known to the police as Unidentified Life Form 22 (未確認生命体二十二号 Mikakunin Seimeitai Nijūni-gō) and B3 (B群3号 Bīgun Sangō), is the rhinoceros-like leader of the Zu Group of Grongi. Zain is able to assume the form of a hulking strongman with a temper to match his brawn.

Soon after the Me Group's turn begins with the Zu no longer worthy to play, and when their first hideout got compromised by the police's smoke bombs, Zain starts acting on his own by attacking trucks and jabbing the drivers to death with his horn.

He overpowered Kuuga in both human and Grongi forms when Biran intervened as Zain stole his turn. While Zain resumes his attack on large motor vehicles, Yuusuke manages to perfect his Mighty Kick to finally kill the rampaging Grongi, breaking his horn in the process.

Kamen Rider Decade

World of Kuuga

At least one Zu Zain Da was part of a group of human-turned Grongi created when they were exposed to N Gamio Zeda|N Gamio Zeda's miasma. Some were later absorbed by him in the last effort to defeat Kuuga and Decade. The remaining Grongi died after Gamio was defeated. Transcendence

OOO, Den-O, All Riders: Let's Go Kamen Riders

He had a brief appearance as one of the monsters who captured Ankh and Momotaros.

Kamen Rider Fourze

Zain was one of a trio of Grongi (with Zu Goma Gu and Me Badjisu Ba) who were seen fighting Kuuga in new video footage that Tomoko Nozama found on the internet, along with other clips of past Kamen Riders, who are now known as urban legends. Space Superiority

Super Hero Taisen Z

To be added

Kamen Rider Wizard

Zain is destroyed by Faiz's Sparkle Cut. Neverending Story

Video game appearances

Kamen Rider Kuuga video game

Zu Zain Da appears as a playable character in the Kamen Rider Kuuga video game.


  • His name is based on the Japanese word for "rhinoceros" ( Sai).


Icon-kuuga Kamen Rider Kuuga
Riku - Yusuke Godai
Arcle | Gouram | TryChaser 2000 | BeatChaser 2000
Tokyo Police Department
Kaoru Ichijo - Hikari Enokida - Sadao Matsukura - Morimichi Sugita - Tsuyoshi Sakurai - Nozomi Sasayama
Other allies and characters
Sakurako Sawatari | Minori Godai | Shuichi Tsubaki | Tamasaburo Kazari | Nana Asahina | Jean Michel Sorrel | Mika Natsume | Shoji Kanzaki | Junichi Chono
Ra Group

Ra-Baruba-De | Ra-Dorudo-Gu

Zu Group

Zu-Gumun-Ba | Zu-Gooma-Gu | Zu-Mebio-Da | Zu-Badzu-Ba | Zu-Zain-Da

Me Group

Me-Badjisu-Ba | Me-Giiga-Gi | Me-Biran-Gi | Me-Gyarido-Gi | Me-Gadora-Da | Me-Ginoga-De | Me-Garume-Re | Me-Garima-Ba

Go Group

Go-Buuro-Gu | Go-Bemiu-Gi | Go-Gamego-Re | Go-Badaa-Ba | Go-Jaraji-Da | Go-Zazaru-Ba | Go-Jaaza-Gi | Go-Baberu-Da | Go-Gadoru-Ba

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