Nothing is known about Everardo's life before the apocalypse.
Everardo is first seen with Pablito cleaning a drainage pipe when they find Daniel Salazar among the debris. Worried about being caught with Daniel as they think Dante's men will believe they are scheming to steal water, they alert Lola. Later, Everardo is in the cafeteria with Pablito, Daniel, and the others eating lunch. The next day, Everardo is taken into custody and framed as a thief stealing water, despite being innocent. He watches in horror as Dante Esquivel throws Pablito over the edge to his death and is horrified when Lola is brought to the edge. Fortunately, his life is saved when Daniel takes out Dante and his men, successfully freeing Everardo and his fellow captives.
Everardo accompanies Efrain, Lola, and Daniel as they distribute water to desperate survivors within Tijuana. He shouts out to his fellow survivors that groups of zombies are approaching from multiple streets, prompting everyone to flee the scene.
As Efrain, Daniel, and Everado drive back to the dam, they are shot at by angry survivors. It was revealed that Everado was grazed by a bullet shot by one of the survivors after a riot broke out, but he is later treated by Efrain and Strand in the dam's infirmary.
Following the attack on Gonzalez Dam, it is unknown what happened to Everardo. It's likely that he was one of the many to be killed by The Proctors gang as all of the Gonzalez Dam guards and people were shot and killed by the gang. If not, he was likely killed by the explosion cause by Nicholas Clark.