Ronnie Delgado is a Los Angeles City Attorney, and the father of Miranda Riggs.
Ronnie Delgado is the City Attorney for the City Los Angeles. He is also the father-in-law of Martin Riggs as Riggs had married his daughter, Miranda. He became so proud to call Riggs his son-in-law.
When he heard Riggs and Miranda were expecting, he became so excited in that he would become a grandfather. But the excitement became so short-lived when he heard Miranda was killed in a car crash, the same as Riggs was devastated. He thanks Riggs for being the husband to Miranda and for bringing her back to Los Angeles, as the rest of their family resides there. Even after Miranda's death, he's still kept in touch with Riggs.
As of recently, it was revealed in the time of Miranda's death, that when she was murdered by drug dealers, led by Tito Flores, who he refused to have any dealings with. Instead of coming after him and then risking out war with the police, Flores sent his henchman Gideon Lyon to go after Miranda and kill her and cover his trails and make it look like a car crash.
Ronnie, being a City Attorney, takes his job serious enough. But also, being a family man, he takes the importance of his relationship with his family even more serious. Having Riggs as a son-in-law, he expects Riggs to stay in touch with him as much as possible. As much as he cared and still does for Miranda just as Riggs did, he misses her a lot just like Riggs does.