This paper toy is the Kamen Rider Fourze (Gentaro Kisaragi), based on the manga / anime Kamen Rider Series. The papercraft is created by Azrael. Kamen Rider Fourze is the main protagonist in the series of Kamen Rider Fourze. His name roughly says Forty, as well as a combination of "Four" and "Zero", an indication of the Kamen Rider Series' 40th Anniversary and the forty different powers and weapons he can access with the Astroswitches.
Gentaro Kisaragi is a second year student in Amanogawa High School, who has a delinquent Yankee-like appearance wearing a short jacket over a T-shirt and baggy pants, with his hair in a pompadour, rather than the clean cut uniform worn by other AGHS students; but is actually really friendly and wants to make friends with people in the school. He is willing to go the extra mile and do bizarre things to get to know someone he wants to befriend better. He puts friendship above anything else and values every friend that he has, to the point of crying hard whenever he hears a sad story of someone he considers a friend. He also has a special handshake he does with his friends and is commonly used when Gentaro makes a new friend. The reason he does so is because he wants to see that person he befriends smile, which is the best feeling one could have. He is generally very earnest and very thick-skinned, as well as not being very perceptive and at times, can actually be very dense. He is also prone to say things other people have a hard time comprehending, due to his unique and bizarre view in things. These quirky qualities are seen by others around him to be both annoying shortcomings and unusual strengths.
Gentaro lives with his grandfather Goro Kisaragi after his parents died in a traffic accident when Gentaro was in third grade. His parents had a job that went above both his and his grandfather's head, but they always were proud when their son made friends. His father also told him that he needed to keep his friends close because they would eventually help him out in the long run.
Gentaro is shown to become increasingly adept in using the Kamen Rider Fourze system as the series progresses. He is shown to only be able to use conventional fighting moves, and has to rely on Kengo's advice on which Astroswitch to use in battle situations early in the series. As he gets increasingly used to fighting the Zodiarts, he learns how to devise strategies on the fly and is seen to be using and changing Astroswitches more often. He is shown to be very resourceful with the use of Switches as he learns how to utilize each one in unusual ways, such as using Limit Breaks of Launcher, Gatling and Fire Switches together to form a long range Limit Break finisher, and Limit Breaking the Rocket and Drill Switches twice when he cannot finish Scorpio off with just his usual Rocket Drill Space Kick. When he has difficulty with properly using a Switch, he will take the time to understand it as he did with the Hopping Switch, ending up capable of using it as a weapon instead of just a tool.
The arsenal of Kamen Rider Fourze was developed by Rokuro Utahoshi who was a part of the Over Space Technology Organization. The OSTO developed technology that enables its user to harness a mysterious form of energy called Cosmic Energy. Rokuro was inspired by his visit to Kyoto and used a hypothetical system its occupants used in ancient times to model the Kamen Rider Fourze system after the Four Chinese contellations as reflected in the specific symbols on the Kamen Rider's limbs: Byakko (Circle), Suzaku (Cross), Seiryū (Triangle), and Genbu (Square). As hinted at by a message by Rokuro, the driving force behind the Fourze System are the bonds of friendship. Thus, not only is Gentaro the best suited to be Kamen Rider Fourze due to his ideals and bonds, but the friends he makes in creating the Kamen Rider Club enables Gentaro to bring out the true potential of Kamen Rider Fourze.
After Gentaro flips the four Switches on the Fourze Driver, he pulls the lever on the side of his belt, which transforms him into Kamen Rider Fourze. Gentaro took the equipment to become Kamen Rider Fourze from Kengo after he followed Kengo. Fourze is based off a space craft and roughly the retired Space Shuttle. Gentaro tends to say "Space is Here!" when transforming into Kamen Rider Fourze and says "Let's settle this once and for all!" before battle. Similar to his predecessors, Kamen Rider Double and OOO, Fourze uses combinations with the Astroswitches and their Modules. However, unlike the Gaia Memories and Core Medals, which need a certain combination to transform into different forms, only a few of the Astroswitches changes Fourze into a different form (known as 'States'). Kamen Rider Fourze has shapes on his limbs where the Modules attach: Circle for the right arm, Cross for the right leg, Triangle for the left leg, and Square for the left arm. The suit itself also doubles as a spacesuit, allowing Kamen Rider Fourze to spacewalk. It also has a hover pack, allowing Kamen Rider Fourze to hover in the air for a short distance. The Red-Eyed Man compares Kamen Rider Fourze's power to that of a gravitational lens, particularly on how the Kamen Rider influences both Astroswitches and Zodiarts Switches. After accepting the title of Kamen Rider, he often names his attacks with "Rider" before it.
Base States is Kamen Rider Fourze's white/default form. This States can be accessed without any specific Astroswitch. On his back that is kept in all of his forms is a hoverpack, which he uses it to either keep him afloat, or to extend his jumps. By using the Rocket and Drill Modules, Base States Fourze can perform the Rocket Drill Kick Limit Break.
However, after he accepts the title of "Kamen Rider", he renames it to include "Rider" in the name for the Rider Rocket Drill Kick. A variation of this is the Rider Rocket Drill Space Kick which is performed outside of Earth's atmosphere from transportation of the Massigler.
When pushing the Enter Lever a second time while still under the power of the first Limit Break, Fourze can perform the Rider Rocket Drill Great Space Kick Double Limit Break, where the auras around the Rocket and Drill Modules are enlarged and allowing Fourze to bore through things his initial Limit Break couldn't do before, but it depletes the Cosmic Energy inside the Switches and needs time to fully recharge.
You can download this paper craft toy here: Kamen Rider Fourze (Gentaro Kisaragi) Cosmic States Free Paper Toy Download