Ana Oncina surprised everyone with her first comic book, Croqueta & Empanadilla, starring an adorable young couple, a reflection of its creator, with a fantastic everyday humor in short gags. It captivated the audience at the 2015 edition of Comic Barcelona, where it was awarded the People's Prize and gained many fans who follow her work on social networks, where the artist interacts with them.

After the third title of Croqueta & Empanadilla, she coordinated with Alex Giménez the comic magazine Voltio, in which she also participated with her story Alicia.

In 2019 she published the comic Los f*cking 30 (The F*cking 30s), in 2021 she published Just Friends, with which she won the International Manga Award in the silver category, awarded by the Ministry of Foreign Affairs of Japan. And in 2023 she published Planeta (Planet).

Currently, she combines her work as an illustrator for the publishing world with the world of comics, publishing her Croqueta & Empanadilla comics and personal reflections with her character on her Patreon page.