|Character in Just Cause 4|
|First appearance||Operation Whiteout|
|Job||Ruler of Solís|
|Last known status||Deceased|
As a sign of personality, he sounds a little arrogant and bored with the information provided by Gabriela during the opening sequence of the game.
As reveal by the Solís Hoy radio, his father was Leon Espinosa. Osacar has also written an autobiography called "I am the son of my father". Leon Espinosa died in a plane crash 20 years ago. Oscar is also a descendant of Diego Espinosa.
According to Diago from the radio show, Oscar is a fan of Diago, although he is unable to prove it upon being questioned about it by Santiago.
He is the ruler of Solís. His formal title is however never mentioned.
When his father died, Oscar took over all the companies and turned the Black Hand from "a bunch of local badasses" into what they are now. In fact, because he funded the Black Hand, he is their employer. Because Solís has no other police, or military, this puts him well above the law.
His fathers plane was taken down by a storm, so officially, this is what motivated him to start the Project Illapa, to end all storms. It's revealed during the course of the game that this was a lie. The origin story of the project and the circumstances of Leon Espinosas death were actually more complicated.