Suugu 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. Suugu was made by Long from Dan's Fierce Ki Soul, though lacking the man's mind. Suugu was previously in a state of rest as the result of undergoing the Blood-Oath Ceremony and thus he was first seen being dragged in his casket by Sanyo. But Suugu was later fully awakened by Long once he was in the presence of Rio. Rio recognizes Suugu as Dan, which eventually led to him embracing the Mythical Beast-Fist as only the Mythical Beast King can command Suugu. Though mindless, a hint of Dan seems to remain within Suugu as seen in his playing of a leaf ocarina. 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. He returned in Kamen Rider × Super Sentai: Super Hero Taisen. 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