Mariana Cagnin, better known as Mary Cagnin, is a Brazilian comic artist.
Having graduated in Visual Arts at Unesp, Cagnin currently works as an illustrator and cartoonist. In 2009 she started the manga-style series in fanzine format; the sixth and final issue was released as a free PDF in 2012. The following year, the series was published by HQM Editora under the HQM Mangá label, in a total of 3 issues. In 2016, she launched the sci-fi story Black Silence, crowdfunding the project on the website Catarse. In 2017, she participated in the graphic novel , by Mylle Silva. She was awarded the Prêmio Angelo Agostini as illustrator and writer. Also in 2017, she was invited by the Brazilian Embassy to participate in the Gothenburg Book Fair. In 2019 she launched the webcomic Bittersweet, which was nominated for Troféu HQ Mix in 3 categories.