Iron Ring Mask

The Iron Ring Mask appeared in 1975 TV series called Himitsu Sentai Goranger. Iron Ring Mask (鉄輪仮面 Tetsu Rin Kamen, 6) was a Black Cross Army Masked Monster who is made up of stacked metal hoops. Iron Ring Mask was leader of an operation in gaining secret access to an EAGLE base it takes from a spy which holds a microfilm that includes many EAGLE secrets, including base locations, projects and all known information about the Gorengers. Kaijo and Asuka pursue him, but he takes a houseboat hostage to save his life, while hiding from the two Gorengers by splitting into his iron rings and blending in. After the Gorengers leave, Iron Ring Mask uses the telegraph on the boat to start reporting secrets to the Black Cross Führer, leading to the destruction of multiple EAGLE bases, yet with the Führer telling him to get the Gorenger secrets. Kaijo and Asuka return to the boat after witnessing the Black Cross' destruction and find Iron Ring Mask, while the other Gorengers catch up using Variblune. Iron Ring Mask tries to use a motorboat to escape, but the Gorenger hit him with Gorenger Storm from a distance, making both him and his escape boat explode.

Arsenals
He can split his body into multiple rings which allow him to sneak into places and re-stacks them in order to utilize a humanoid form; he also can use his rings as bombs and has super strength. His most dangerous attribute, though, is a computer installed within his body that can analyze information, including through microfilm cassettes it can install into its head, that can steal enemy secrets. He can also jump high into the air.