Sold9 is a Military-Type HumaGear produced by ZAIA Enterprise and one of two secondary antagonists in the V-Cinema film Zero-One Others: Kamen Rider MetsubouJinrai.
He can transform into the Dire Wolf SoldMagia using the Dire Wolf Zetsumerise Key.
He is portrayed by Ken Sugawara.
Sold9 and Sold20 accompanied ZAIA CEO Lyon Arkland to kidnap Jin so he could be used as a connection manager for the Mass Brain system meant to link the Sold HumaGears. While Lyon became Kamen Rider ZAIA, Sold9 and Sold20 assumed their SoldMagia forms to assist him. They succeeded in defeating both Jin and Horobi, enabling Lyon to take Jin hostage and escape back to ZAIA's Japan branch.
When the other members of MetsubouJinrai.NET broke in and rescued Jin, Sold9 and Sold20 led the SoldMagia against them. They overpowered them at first, but were fought off when the four Riders used the Mass Brain system to combine their data to create Kamen Rider MetsubouJinrai, who defeated all of them.
The Solds were later released from the Mass Brain system by the power of Kamen Rider MetsubouJinrai, after the MetsubouJinrai.NET Riders became him once again. They weren't seen after MetsubouJinrai destroyed ZAIA's Japan HQ.