This essay looks at the construction of personhood in Brazilian Amazonia from the perspective of Indigenous youth. In Amazonian sociocosmology, personhood is constructed relationally, a process in which the body is a distinctive factor. Consequently, during schooling and university studies, young people have responded to and resisted representations and policies that have often silenced Indigenous voices and limited their fabrication of bodies. The contemporary social responsibilities of Indigenous youth and the challenges faced in undertaking them shape how their subjectivity, agency, and recognized social belonging are being constantly increased, removed, or even denied. The essay draws from anthropological theories of relational personhood, as well as ideas of geo- and body-politics present in theorizing on the Global South.