Mariana Gesteira Ribeiro (born 28 June 1995) is a Brazilian Paralympic swimmer.

[1] She competed at the 2020 Summer Paralympics in Tokyo, where she won the bronze medal in the 100 meter freestyle event in the S9 class.

[3] Ribeiro learned to swim at the age of ten.

At 14, she was diagnosed with Arnold Chiari syndrome, a condition that affects the brain and nervous system.

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