Franklin Clinton is one of the three main protagonists of Grand Theft Auto V. He is a friend of Michael De Santa, Trevor Phillips and Lamar Davis.
Franklin use to work for his boss, Simeon Yetarian, who sells vehicles to his customers who can't afford them and then repossesses them via shady finance schemes and other odd methods. He met Michael De Santa while stealing his son's BeeJay XL and Franklin led Michael into confronting and beating up Simeon for what he was doing. From that point, Franklin gave up this job and left Simeon as well as befriending Michael. From that point, Franklin allied himself with Michael and went on many heists and missions together.
Franklin then helped his best friend, Lamar Davis, in kidnapping a Ballas member named D and managed to capture him. However, they released him.
Later on, Trevor Phillips found Michael and so Franklin befriended him too.
Towards the end, Devin Weston came around to Franklin's house to give him the choice of killing Trevor, killing Michael or saving them both. If Ending A is chosen, Franklin will chase down Trevor in his truck and will eventually call Michael for backup to take out Trevor. Michael will arrive and crash into Trevor's truck, causing him to crash into a gas tanker. Covered in gasoline, Trevor crawls out of his truck and says his surrounded by "Judas". Either way, Michael or Franklin will shoot Trevor, causing him to get set on fire and die. If Ending B is chosen, Franklin will chase down Michael and Franklin will call Trevor for backup but Trevor tells him to stay away from him. Franklin will then chase Michael throughout a construction site to try and kill him, Michael will eventually fall off the site and die.
If Ending C, the trio and Lamar will meet up at the foundry to take out several FIB Agents and Merryweather Soldiers. Afterwards the trio form a list of their enemies to kill as an act of revenge which is Stretch, Wei Cheng, Steve Haines and Devin Weston. They kill the three and Trevor heads towards Devin's Mansion to kill the guards and he kidnaps Devin. Devin is taken to the top of a hill where his stuffed into the back of a car and thrown off where his killed.