The objective of this work is to understand the historical path of Valkyria Montes in sport and, from there, to problematize the participation of a trans women in sports competitions, whether they are official or not. To this end, we developed a case study characterized as descriptive and qualitative. For data collection, we conducted an interview with a semi-structured script that was later transcribed and analyzed by the content analysis technique. As a result, we found that, although Valkyria's participation in volleyball is hybrid, since she participates in competitions for both male and female, she still finds significant resistance to be able to act among cisgender women, based on legal aspects, moral and ethical aspects that circumvent the premises of equality and justice in the spheres of sport.