cybertronian was a umbrella term known to categorize those who's origin or DNA hails from the planet of cybertron. There were grounders and flyers, headmaster, combiners, insecticons, maximals and predacons, and even some rather tiny cybertronians called minicons.

One of the rarest sub-dominations were known as Cassetticons.

Cassetticons were are most often decepticons who, on Earth, transform into mass displaced audio cassettes and had other alt-modes. Many served under soundwave and would fit into his chest compartment, for he was a cassette carrier frame type.

Often the relationship between the little cassettes and their carriers were paternal. Since more often then not, the cassetticons were produced asexually and personally designed for purpose by their carrier.

However, what had not been seen before once, was a carrier creating and designing cassetticons for another.

soundwave, however, had trusted and befriended a human who he cherished dearly. And as a gift of your 5th year in service to the decepticons. He gifted you two cassetticons for you to raise and be protected by. so that you never were away from a piece of cybertron.

This was one of those cassetticons

His name was Rewind, the second born from the egg sack that sat toasty in a dark corner of your closet (the ideal hatching location). He had black plating with red and orange accents. he was born with a head camera, likely destined to be a recording cassetticon rather than a weapon variation. He was shy compared to his blue and courageous twin, Eject.