In her works as an illustrator, Roberta Marrero mixed and de-contextualized popular images, giving rise to new meanings, and using the technique of artistic appropriation.

"[2] In her 2016 book El bebé verde: infancia, transexualidad y héroes del pop, a graphic novel with a prologue by the writer Virginie Despentes, Marrero collects memories of her childhood and her transsexuality, explaining how the worldview of various artists from pop music, literature, and cinema inspired her, especially Boy George.

Joe Dallesandro, model, actor, and star of Andy Warhol's The Factory, chose one of her illustrations for limited edition t-shirts.

In addition, she sampled from the Fauvist movement, expressionism, surrealism, Catholic religious painting, classical Hollywood, and punk.

The designer and her husband Andreas Kronthaler responded that the image had been copied without knowledge that it was a work by a contemporary artist.