Barnaby es presentado como un héroe pulido y altamente capaz, inicialmente asociado con Kotetsu. Su evolución a lo largo de la serie, desde un solitario a un héroe más abierto y confiado emocionalmente, es central en la narrativa.
Karina is introduced as a hero with a glamorous, idol-like persona, whose powers are often overshadowed by her fame. Over the course of the series, she proves herself as a capable and determined hero, though she faces challenges related to her public image.
Kotetsu is introduced as a seasoned but somewhat washed-up hero in a world where heroes are public figures, sponsored by corporations. He takes on a new partner in Barnaby Brooks Jr., and his journey shows his growth as a mentor and father figure.