Ivanira dos Santos da Silva, a matriarch of the Sagi Jacu village, has been a powerful symbol of resistance in the ongoing struggle of the Potiguara people in Rio Grande do Norte for the demarcation of their lands. Over the years, they have faced significant challenges, particularly with increasing real estate speculation and agribusiness encroaching on their territory. Ivanira, who grew up in the indigenous territory, has been at the forefront of many battles, witnessing firsthand the violent displacement of her people during the late 20th century when a local farmer illegally took over parts of their land.

The Potiguara people's struggle is deeply rooted in traumatic experiences, with memories of family members being forcibly taken and threats of violence looming over them. Ivanira's leadership emerged during these challenging times, when the elders and community members needed to rally together to reclaim what was rightfully theirs. Her resilience and determination became a beacon of hope for her community, inspiring them to continue advocating for their rights.

Even into her 70s, Ivanira remains active in her fight for indigenous rights, most notably participating in a protest in 2017 that blocked access to the airport in Natal. This protest aimed to shed light on the closure of a local branch of the National Foundation of Indigenous Peoples (Funai), which plays a critical role in protecting indigenous rights within the state. Her continued activism, alongside her family and community, emphasizes the ongoing challenges faced by the Potiguara and underscores the importance of land rights for indigenous peoples in Brazil.