Shigeru Jo is the main protagonist of Kamen Rider Stronger. Shigeru was reconstructed as Electric Human Stronger by the evil organization Black Satan before he escapes with fellow cyborg Yuriko Misaki, thus renaming himself as Kamen Rider Stronger. Stronger's primary motif was that of electricity. All his attacks were based on electricity, and the cyborg aspect of his body is much more prominent than in the previous series; for instance, his hands were metal coils that had to be covered when he didn`t transform.

Additionally, the "form changer" motif makes its first appearance in Stronger. Stronger's "Charge-Up!" mode predates Roborider and Biorider of Kamen Rider Black RX, and the primary themes of the Heisei and Neo-Heisei eras starting with Kamen Rider Kuuga, the main characters' ability is to change forms during battle to adjust varying situations. Kamen Rider Kabuto, where each Rider character can shift between a bulky armored form and a lightly covered, fast form, also features this concept prominently.