Ricardo is Marshal Waits second in command. He's in charge of helping Amanda Ripley trap the Alien. But when their original plan fails, he guides Ripley to another location to trap the alien. He is one of the few survivors when the androids go rogue. After which, he helps Ripley put into motion an escape plan for the two of them aboard The Torrens. Unfortunately, he dies to a Facehugger just before Ripley makes her way back to him.