This papercraft is the G-stone, based on the anime TV series The King of Braves GaoGaiGar, the paper model is created by Kreuzer. The G-Stone is an energy source developed on the Green Planet by the "Green Planet's Protector," Cain, to emulate the natural Zonder-purifying powers of his newborn son, Latio. The resulting green gemstone is capable of converting courage into life force, which can be converted into power using the GS-Ride. When crystallized in a large enough form (aka G-Crystal), it also produces an aura of power known as the Genesic Aura. The energy produced by a G-Stone is the polar opposite of Zonder Metal, and when the two energies collide they erase each other, leaving only the stronger energy remaining in the end.
The G-Stone was first used to power the mechanical lion Galeon, meant as a counteragent to the 11 Planetary Masters of Sol. Due to the rapidity of the Z-Master's advance, however, Galeon was instead sent to Earth. When Galeon came into the custody of GGG in 2003, Professor Leo Shishioh discovered a cache of G-Stones stored within Galeon, and used information from its databanks to help mass-produce related technology.
Every G-Stone is connected to every other G-Stone, allowing information to travel between bearers across any distance. For this reason, it is known by both Leo and later GekiRyuJin as an "infinite information circuit". Because its power derives from the bearer's courage alone, the G-Stone can produce infinite energy, or even beyond infinite - whatever is needed for the bearer to claim victory.
Whenever a being or machine is particularly overflowing with G-Stone energy, it takes on a bright green coloration - this behavior is not observed with the J-Jewel, but is seen in the derivative Loud G-Stone.
The King of Braves GaoGaiGar is an anime television series series begun in 1997, created by Sunrise's internal "Studio 7" under the direction of Yoshitomo Yonetani, and was the eighth and final in the Yūsha metaseries funded by Takara and produced by Sunrise.
It takes place in 2005, two years following an incident where the first identified extraterrestrial intelligence - classified as "EI-01" - crash-landed on Earth and absorbed a large number of machines into itself before disappearing without a trace. Following this incident, the Japanese government created a secret organization to combat potential alien threats: the Gutsy Geoid Guard, or "GGG", based beneath G-Island City in Tokyo Bay. Parasitic alien life-forms known as "Zonderians" have begun to emerge; using the Zonder Metal of which they are made, they can assimilate various kinds of matter to form "Zonders." which use humanoid beings as their hosts.
GGG gains three key resources with which to combat this threat. There is Galeon, a sentient mechanical lion of alien design. There is the alien child Mamoru Amami, whom Galeon had left with human parents eight years earlier. The third asset is human cyborg Guy Shishiō, whose life was saved by Galeon two years earlier and is capable of fusing with him, forming the mechanoid GaiGar. When combined with the GGG-made GaoMachines, GaiGar becomes the Super Mechanoid GaoGaiGar: a mecha capable of defeating Zonders, recovering their cores for Mamoru to "purify" and saving the human host in doing so.
You can download this anime paper craft template here: The King of Braves GaoGaiGar - G-stone Free Papercraft Download