The Experts of Justice
- Badass Normal: The only main character without either actual superpowers or stock Charles Atlas Superpower.
- Dub Name Change: "Johnny Sokko" in the dub of the original Tokusatsu series.
- Falling into the Cockpit: Forced to pilot Giant Robo after his father's death.
- Kid With The Remote Control: "(T)he greatest robot on the planet, Giant Robo, commanded solely by one young man: Daisaku Kusama!" Across all incarnations of the series, one of the Trope Codifiers.
- Orphan's Plot Trinket: The wristwatch used to command Giant Robo.
- Action Girl: A deadly shot with a Hand Cannon.
- Cool Big Sis: Quickly bonds with Daisaku as a protector and mentor.
- Mad Scientist's Beautiful Daughter: She is secretly Farmele von Fogler, the daughter of the doctor who the world blamed for the original Tragedy of Bashtarle, now trying to put her past behind her. Her struggle with her father's legacy is a significant plot element.
- Teleportation: Both she and Genya have this power, which they used to escape ground zero at Bashtalle along with Professor Go and Doctor Von Fogler.
- Teleportation Sickness:The flaw of her teleportation ability is that it weakens her the more that it's used. At the end of the series, after performing a Mass Teleportation, parts of her body are slowly disappearing one by one.
- Asskicking Equals Authority: He's one of the Big Nine, the good counterparts to the Magnificent Ten.
- A Father to His Men: Willing to use his Dangerous Forbidden Technique, which is strongly implied to be fatal, to fight Lord Alberto and cover the retreat from the Peking IPO base.
- Da Chief: The Experts of Justice answer to him.
- Combat Hand Fan: Uses huge war fans, mainly for defense. In the first OVA episode, his "Iron Fan" technique blocks an attack from Lord Alberto.
- My Greatest Failure: Was a lab assistant during the Tragedy of Bashtarle.
- Big Brother Mentor: Tetsugyu still calls him "big brother", and he's formed a similar bond with Daisaku.
- Expy: Of Dai Zong from Water Margin, particularly Yokoyama's manga adaptation.
- Happily Married: With Youshi.
- Mentor Occupational Hazard: He willingly takes a fatal blow from Alberto in the fourth episode to buy time for the others to escape. His sacrifice motivates character development for Daisaku, Tetsugyu, and even Lord Alberto.
- Worthy Opponent: He and Shocking Alberto view each other as this.
Big Fire / The BF Organization
- Composite Character: He is based on both His original Mars manga counterpart, and Sally's Father, due to it was mentioned that Sunny the Magician is the daughter of Alberto.
- The Heavy: Genya's in charge, and has ties to the plot, but Lord Alberto is the man who attacks and almost destroys an IPO base singlehandedly.
- Worthy Opponent: He and Taisou view each other as this.
One of the team of scientists who created the revolutionary Shizuma Drive, he was thought to have died after causing an infamous accident during its development. Now, as the other creators of the Drive are found dead, his form can be seen promising revenge on them and on the world...
- First Episode Resurrection: Murasame discovers the doctor, thought to be long-dead, in a cathedral bell tower in Paris next to the corpses of three of his former teammates. Subverted — Von Fogler was Dead All Along, and Genya was in disguise to better carry out his will.
- Mad Scientist: Introduced as the man who caused the destruction of Bashtarle and a worldwide disaster, because of his experiments with the prototype Shizuma Drive.
- New Era Speech: During the first flashback to the Tragedy of Bashtarle, he delivers an example so memorable it's made into the prologue of the second episode.