Suugu is a warrior of the Genjuken and a major antagonist in Juken Sentai Gekiranger. He is a master of the Mythical Beast Chimera-Fist, a style that allows him use any Beast-Fist technique from the Fierce Beast-Fist and the Confrontation Beast-Fist Akugata.
Juken Sentai Gekiranger
Suugu was made by Long from the Fierce Ki Soul of Dan. He was previously in a state of rest due to undergoing the Blood-Oath Ceremony. After his casket was brought to Long by Sanyo, Suugu was later fully awakened by Long once he was in the presence of Rio. Rio recognizes Suugu as Dan, leading him to embrace the Mythical Beast-Fist as only the Mythical Beast King can command Suugu. Long tricks Rio into ordering Suugu to kill Jan. During the battle, after nearly killing his son, Suugu's memories as Dan reawakened, allowing him to overcome the Blood Oath's effect on him as he took the blow Long intended for Jan. Mortally wounded, Suugu has Jan deal the deathblow to release Dan's Fierce soul from his physical prison. His name is based on Sōu Yú (騶虞) of the Shi Jing, and motifs are the White Tiger and the Tiger of the Earthly Branches.
Super Hero Taisen
He returned in Kamen Rider × Super Sentai: Super Hero Taisen as a member of Dai-Zangyack. In the movie, he was only seen strangling GekiYellow, and is attacked by Rod Den-O.
Super Hero Taisen Z
Suugu was part of an Army of Resurrected (mostly Super Sentai) monsters led by Space Raider after the revival of Madou Demon King Psycho. They proceeded to attack the gathering of Kamen Riders and Super Sentai, giving them a hard time. The heroes of recent years were in a pinch until the arrival of a force of Sentai and Rider reinforcements led by Akarenger and Kamen Rider Ichigo. The combined forces of superheroes were able to turn the tide against the Madou army. They lined up and used their various finisher attacks to destroy the revived monsters.
Suugu's Gengi allows him to use both Gekiwaza and Ringi:
- Fierce Beast Tiger-Fist Style: Gun-Gun Bullet
- Confrontation Beast Scorpion-Fist Style: Crimson Lotus Vermilion Whip Kick
- Confrontation Beast Toad-Fist Style: Oily Body-Armor
- Confrontation Beast Crocodile-Fist Style: Mudbank Torso Snapping