Born in the United States, she represents the Dominican Republic women's national team.
[1] She attended Hall High School,[2] where she was named all-state as a senior and was a three-time all-conference selection.
[3] In 2019, Dionicio began attending Yale University, where she played for the women's soccer team.
[3] In 2023, she transferred to the University of Connecticut as a graduate student, where she played for the women's soccer team.
[10] On 19 February 2022, she scored her first international goal in a 4–0 victory over the Cayman Islands in a 2022 CONCACAF W Championship qualification match.