Marthina Simonne Aguirre Alarcón (born 25 January 2001) is an Ecuadorian footballer who plays as a midfielder for college team South Alabama Jaguars and the Ecuador women's national team.
Aguirre was born and raised in Denville, New Jersey. Her parents are Ecuadorian.
Aguirre has attended the Isaac Newton Private Educational Unit in Quito and the University of South Alabama in Mobile, Alabama.
Aguirre has played for Universidad San Francisco de Quito and Dragonas IDV in Ecuador.
On 21 November 2024, Aguirre signed for Peterborough United. She left the club in the summer of 2025 in order to return to Ecuador, after scoring 1 goal in 8 total appearances.
Aguirre made her senior debut for Ecuador on 27 November 2020.