This cube craft paper toy is the Gavan, based on the TV series "Space Sheriff Gavan", the papercraft is designed by tjaizue. Gavan is the first Space Sheriif who comes to Earth to battle an evil alien mob led by his archnemesis, the Don, who killed his previous commander. He enlarge himself to combat giant monsters.
Space Sheriff Gavan is the first of the Metal Hero Series. It aired on TV Asahi from 5 March 1982 through February 25, 1983. For distribution purposes, Toei refers to this television series as Space Cop Gabin.
The Metal Hero Series is a genre of tokusatsu superhero TV series produced by Toei for Japanese television. The protagonists of the Metal Hero Series are androids, cyborgs, or humans that don metallic suits and are also referenced as "Henshin (transforming) Heroes." Usually, the genre revolves around a technological theme where technology, in the right hands, can be used for the greater good.
You can download the cube paper craft toy here: Space Sheriff Gavan - Gavan Cube Craft Free Paper Toy Download