[1] She is the writer, director, and producer of the awarded documentary Cloudy Times (Original name in Spanish: El Tiempo Nublado).

Ullón was 19 years old when she directed her first film, Absence of an Own Name (Original title in Spanish: Ausencia de un nombre propio).

[11] Continuing her career as a producer, she also worked on music videos, TV ads, the production of shows for children as “Lori Club”.

Forced to leave their ancestral lands in spite of the Paraguayan laws granting them rights, the Ayoreo often find themselves in hostile urban contexts to which they are unable to adapt, which reject them and push them towards marginalisation.

"[20] Ullón also wrote a book about gender violence, About Abuse and Other Relatives (Original Title in Spanish: Sobre abusos y otros parientes).

[17] Ullón's work is highly tinted with social tones and brings attention over matters that deserve debate and awareness.

Even though conversations about democracy were regarded as taboo and highly subversive during the dictatorship era, Arami worked in the production of the  first TV show that offered public debate on social and political subjects in Paraguay.

Her first film Absence of an Own Name (Ausencia de un nombre propio), discussed a teenager's sexuality as a natural an transcendental part of her being.

Gender roles and expectations, social security of the lack thereof, and the precarious system of care for elderly citizens.

[22] Nothing but the Sun illustrates the distressing story from the Ayoreo people, who are systematically discriminated against, traumatically uprooted, denied of their cultural heritage.