Courtesy of DecaEnd:

Right arm – Rocket
Right leg – Launcher
Left arm – Radar
Left leg – Drill

Gentaro Kisaragi: The main character of the series, second year. He recently transferred to Amanogawa Academy. He’s a bad boy rocking a short pompadour hairstyle.
He declares that he will become friends with everyone in the school. He meets Kengo Utahoshi, as if it was destined for them to meet. Gentaro recieves the Foruze Driver and starts the Kamen Rider club in school.
He seems to be an idiotic character.

Kengo Utahoshi: The main character’s partner, second year. A young man who had the mysterious switches. He’s a key person to the whole story.
His locker seems to be distorting space and he’s somehow able to reach the moon base, “Rabbit Hatch” through the locker. He’s also able to pull out the super bike “Machine Masshigura”.
He might be physically weak, but he has strong heart full of will.

Yuuki Joujima: The heroine of the story, second year. She’s Gentaro’s childhood friend.
She’s a bright and cheerful high school student, she refers herself as a “space nerd”.
She usually heads over to JAXA after school. JAXA is like some space thing in Japan.
She’s the only one that Kengo can actually trust, Kengo shared his secret about his special locker to her.

Miu Kazashiro: Third year. She’s somewhat the queen of the school as she is a cheerleader.
She’s the daughter of a rich family. Ever since she was born, she was always treated like the bee queen. No matter where she goes in school, her two sidekicks will always follow her.
She’s a beuatiful girl with pride.

Jun Daimonji: Third year. The captain of the American Football team.
There’s a hierarchy going on in Amanogawa Academy, with sports-oriented guys on the top. They are usually bullies. (Referred as jocks)
Jun is standing on the absolute top.

Tomoko Nozama: First year. She’s the goth girl with black make up under her eyes.
She always brings her Tablet PC with her and has a weird laughter.
She seems to fixate and obsess over various things, but the details are unknown.

JK (Jake): First year. Jake is the information provider of the school.
He easily detects danger and is a coward who always runs away.

Sarina Sonoda:
Gentaro’s homeroom teacher and the teacher of classical literature.
She’s young and beautiful, every student loves her. Although, she has trouble with Gentaro and Kengo.

Chuuta Oosugi: The geography teacher.
He’s middle-aged man with bad looks and personality. No one seems to like him. He seems to be trying to get it with Sonoda, but it just won’t happen.

The man with red eyes (Previously known as the mysterious man):
A mysterious man who caused some incident and has the “Zodiarts Switches”
He seems to have a connection with the school, but he’s a complete mystery.