[7][8][9] Just like fellow Brazilian and former Invicta FC Atomweight Champion Herica Tiburcio, Souza went on to win the title in her very first fight on both the promotion and outside of her native Brazil.

Souza successfully defended the title against DeAnna Bennett at Invicta FC 15: Cyborg vs. Ibragimova on January 16, 2016.

[19] However, it was reported that Souza pulled out of the bout, citing ankle injury and she was replaced by current Virna Jandiroba.

[21] However, on June 7, 2019, it was reported that Calvillo was forced to pull out of the bout due to a broken foot and she was replaced by Brianna Van Buren.

[23] Souza was expected to face Virna Jandiroba, replacing Cortney Casey, on December 7, 2019, at UFC on ESPN 7.

[27] Souza was expected to face promotional newcomer Kanako Murata on November 14, 2020, at UFC Fight Night: Felder vs. dos Anjos.

[34] On January 24, 2025, it was reported that Souza had been arrested in Brazil, accused of being involved in drug trafficking and illegally possessing a weapon.