Originally named Blaster, this Autobot communications specialist undergoes a dramatic transformation within the narrative continuity, primarily stemming from the Japanese-exclusive *Headmasters* anime and associated media. As Blaster, he served as the Autobots' communications officer and commander of the Autobot Mini-Cassettes, who viewed him as an older brother. He maintained a fierce rivalry with his Decepticon counterpart, Soundwave. A climactic duel between the two on Earth in 2011 resulted in mutual destruction. The Autobots recovered Blaster's body, reconstructing it using technology from Fortress Maximus's battleship. This process led to his rebirth as Twincast, involving a physical redesign with a new blue, yellow, and red color scheme and a retooled chest compartment capable of simultaneously housing two cassettes. This upgrade mirrored Soundwave's own resurrection as Soundblaster. Reborn as Twincast, he retained his communications expertise but gained enhanced capabilities. His first major mission saw him infiltrate the Decepticon base within Trypticon to disable a bio-engineered creature controlled by Soundblaster. Twincast succeeded by destroying Soundblaster's tape controller. He continued deploying cassette allies like Steeljaw—now equipped with a special decal that revealed Scorponok's weak spot when viewed through Twincast's translucent red chest door. Elsewhere, Twincast's origins diverge. The Dreamwave *Generation One* comics depict him as one of several Shockwave clones, stored in a laboratory alongside Sunstorm. This version was discovered by the Battlechargers but perished when the facility was destroyed. Alternatively, the Marvel Comics portray Blaster as a grim, rebellious loner harboring deep hatred for Decepticons and authority figures. This incarnation operated within Perceptor's resistance cell on Cybertron, later clashing with Autobot leader Grimlock and eventually going AWOL with Goldbug. Twincast's toy history reflects his media appearances. The original 1987 Japanese-exclusive toy redecoed the first Blaster mold with brighter colors and a retooled chest. A modern *Legacy: Evolution* Voyager Class toy (2023) recreated his *Headmasters* design as a redeco of the Kingdom Blaster, featuring a new head sculpt and including the cassette partner Rewind; this release omitted the double-cassette door due to potential design issues. In the poorly received Omni Productions English dub of *Headmasters*, Twincast was erroneously named "Billy," contributing to the dub's notoriety for incorrect nomenclature. Across all iterations, the character evolves from a music-loving, energetic Autobot into a technologically advanced warrior, consistently maintaining his core function as a communications specialist despite differing backstories and physical forms.