Heully Rios Santos, also known by the alias "Costelinha," is a notorious Brazilian criminal figure known for his coldness and lack of remorse. He is a homicidal drug dealer, robber, and assailant, with a history as a former gangster and gang member. Costelinha's criminal career has been marked by extreme violence and numerous serious offenses. He was initially imprisoned in 2016 for 20 homicides and his involvement in other heinous crimes in Goiás state, Brazil. His actions during this period earned him a reputation as one of the most dangerous criminals in the region. Despite his incarceration, Costelinha's influence and notoriety did not diminish. In 2026, he managed to escape from prison, and to join The ISG due to recidivism.