Steelhead (Japanese: ヨロイビトYoroibito) are characters from Pokémon Ranger: Guardian Signs. They are found in the past and are members of the Pokémon Pinchers in the present, where they are controlled by the Societea and Purple Eyes. They are first encountered in the Oblivia Ruins, where they are keeping Leanne and Nema hostage. They are then seen on Mt. Layuda and in the Sky Fortress. There are also two Steelhead guards when Kasa is escorted into the inner part of the Oblivia Ruins. It is later revealed that the Steelhead in the present are just Pinchers wearing armor, but the armor eventually takes control of their minds.
The Steelhead have a unique type of armor that has the ability to convey feelings to Pokémon, in a similar manner to the Capture Styler. This gives them the ability to control Pokémon, however the user's bad feelings are conveyed as well. There is also a set of golden armor that gives the wearers immortality. This armor has five pieces, being the two armparts, the shoulders, the body and the helmet.
In the past, the Steelhead are human oracles that can control Pokémon using their armor. Kira and Tanvir were once oracles but gave up after their fighting caused the Pokémon to fight as well. They serve as bosses at the end of the temple missions and the final boss (Temple Captain) is unique. Dasios of the Forest Temple attacks with a Tangrowth. Flegos of the Fire Temple attacks with a Tyranitar. Pagos of the Ice Temple attacks with an Abomasnow. Brotos of the Thunder Temple attacks with an Electivire. Sabios of the Dark Temple attacks with a Dusknoir. Finally, Ellios of the Light Temple, Ravio's father, attacks with Arceus. Edward's golden armor in the present was owned by Sabios of the Dark Temple as well.
Yoroibito literally translates into "armor human" (鎧人).