This papercraft is Space Sheriff Gavan, the son of Tamiko Ichijouji and Voicer, having lived on Planet Bird for most of his life until he is assigned the task to protect Earth against the invading Makuu Empire by donning the alias of Retsu Ichijouji, based on the same named anime (For distribution purposes, Toei refers to this television series as Space Cop Gabin) of the Metal Hero series, the paper model created by ZRP Papercrafter. There is also a Space Sheriff Gavan Cube Craft Paper Toy on this site.
When needed, Gavan yells "Jōchaku" so the Dolgiran can encase him in Granium particles that form into his silver chrome combat suit within 0.5 seconds. When no longer needing the armor, Gavan utters the Vacuum Evaporation command for his suit to be sent back to the Dolgiran. He is an accomplished athlete and has various weapons at his disposal. Though he relinquished his position as Earth's protector to his successors, marrying Mimi after Shaider's mission on Earth was completed, Gavan battled other enemies like the Madou, the Fuuma cult, and the Zangyack Empire. During the events of Space Sheriff Gavan: The Movie, Gavan selected Geki Jumonji to succeed him as the new Gavan. He is now promoted to commander status during the events of Kamen Rider × Super Sentai × Space Sheriff: Super Hero Taisen Z.
You can download this papercraft model here: Metal Hero - Space Sheriff Gavan Free Papercraft Download