Fred William Nicácio Souza de Oliveira (born 23 February 1987) is a Brazilian doctor, television presenter, physical therapist, and digital influencer.

He became known nationally for his participation on Big Brother Brasil 23, where he was eliminated, but then returned through the "Repechage Twist" portion of the show.

[1][2] A native of Campos dos Goytacazes, in the state of Rio de Janeiro, he is a practicing doctor in the field of dermatology and intensive therapy.

[3][4][5][6] Before his participation on Big Brother Brasil 23, Nicácio went viral online in 2018 for one of his medical appointments being in Brazilian Sign Language (Libras) for a couple that had hearing issues.

[7][8][9] In January 2023 Nicácio was confirmed as a participant as part of the Celebrity team on the TV Globo program Big Brother Brasil 23.

"[16][17][18] On 20 January 2023, Nicácio was the victim of religious intolerance and racism by Cristian Vanelli, Gustavo Benedeti, and Key Alves.

[24][25] On 19 March 2023, BBB23 announced a new dynamic feature, the "Repechage Twist", which would reunite all the eliminated participants up to the ninth week (with the exception of Bruno Nogueira, who withdrew, and Antonio Carlos Júnior and MC Guimê, who were expelled) in a new space to achieve a redemption.

Councilwoman Thais Ferreira (PSOL) recognized him as an honorary citizen of the city of Rio de Janeiro for him confronting sensitive topics such as racism and religious intolerance on the show.