Rocky Morningstar's History
Early Life
Rocky was born on [Insert Date here], in the district of Kansas. He is the second son of Lucifer, making him a hybrid of Human and an Angel. He is the second and only known Nephilim to be sired by an Archangel. Rocky was taken in by his nice adopted family who would teach him how to behave like a normal being and tried to master his powers.
After being born, Rocky began searching for his father, Lucifer and showed great confusion at the world around him. All that he appeared to know was that his mother was good and his father was supposed to be waiting for him, but nothing beyond that.
Since his father is Lucifer, it is a general assumption that Rocky is the embodiment of pure evil. This belief was originally shared even by his mother, who attempted suicide after his younger brother Jack was concieved so that her second child wouldn't be unleashed upon the world. This made Rocky learn about the consequences of his actions and gain a better understanding of mortality.
After that his younger brother resurrected their mother, however, as their mother then became convinced that Jack could be good, and that the world needed him. Unfortunately, for Rocky he was already a bad boy before he was conceived.
Eventually, after Rocky helped them defeat a demon, his Uncle also became hopeful that Rocky can turn out to be good, and could make the world a better place. They both even claimed to have been shown a vision of a future without pain, fear, or suffering.
Childhood
Rocky never knew his father, as Lucifer left shortly after his son was conceived. Rocky grew up in Kansas under the care of his mother, Kelly and his Uncle, Castiel. Throughout his childhood, Rocky became something of a wild child, getting into numerous fights. He became very close to his mother.
When other children asked where his father was, Rocky told them that his dad was the president and was busy with his career.
Losing his Mother
When he was 11 years old, Rocky mother became afflicted with humanity, that, unbeknownst to Rocky, Kelly killed herself, who feared that her sons growing attachment to Lucifer would turn him away from his plan. His mother's death worsened over time, and shortly before she died, she gave Rocky a note attached to it. In her final moments, she begged Rocky to hug her, but he could not bear to look at her. She died seconds later, leaving Rocky distraught and screaming for her as he was pulled from the room by his Uncle, Castiel.
Directly after her death, Rocky ran out of the house crying.
Castiel, knew very well of Lucifer's true nature and plans. So, he instead decided that he and the Winchesters would keep Rocky and Jack as their own and chose never to tell him about their father.
Raised by The Hunters
The hunters taught Rocky how to be the perfect Hunter. Rocky later recalled how, growing up in a hunter clan, Dean Winchester had often "kicked the crap out of him in order to teach him how to fight and kept him in terror by threatening to eat him.
As he grew older, Rocky started going by the name The Awesome One, which was a nickname given to him by Dean. Dean gave Rocky a few to win a girls heart. When he was ten years old, Rocky had his childhood crush, Katelyn Miller.
Quest for a hunt
Rocky built up a reputation as the self-proclaimed legendary outlaw and continued to work for the Winchesters. During his time with the hunters, Rocky had become disloyal to them, eventually planning to kill an innocent.
Before joining the Winchesters, Rocky lived in the ways of an average criminal and thug, going so far as killing an innocent.
Before The Apocalypse
After his younger brother, Jack accidentally killing someone, Rocky showed great devastation and remorse for his actions and left his home and was sent him to a better place because they were afraid that if he stayed, he would eventually hurt them. This act also motivated him to go out on his own and master some of his powers to prove he is good.
The Apocalypse
As God offers to bring back his friend's mother if a hunter kills his brother, but his friend refuses, knowing that the hunter's mother would never want that. With the hunters continuing to refuse to cooperate, Rocky hopelessly watches as God eventually snaps his fingers and smites his younger brother Jack infront of him, leaving Jack with his eyes burned out and surrounded by the imprint of his wings.
After his younger brother's death, Rocky kneels on the ground before he expresses understanding for what is about to do, stating that he knows what his brother has done and that Rocky has been right all along and God is turned into a monster. However, he can't bring himself to kill God and instead throws away the gun.
His Uncle is disturbed by the fact that Rocky's every attempt to be bad and says he no longer feels anything no matter how much he wants to as for him it was all for fun.
Still distressed over his part in his younger brother's death, he sits alone in a warehouse and asks for his Uncle's ghost to help him, instead he is met by his subconscious manifestation of his father, who tells him that the hunters still hates him and he needs to understand he is all he has left.
Something in him instead of him appearing vicious, he appeared to be sweet and mischievous.
It was learned that he will be hunted down by few hunters and he is beyond redemption, and offers him a place in Mystic Falls so as to make the world a better place, assuring him that it will make God happy.
Shortly after the war, and, in an attempt to escape, after discovered the evil behind his origins from God once he eventually left and find a better place to live. As he was sent to Mystic Falls to start a new life.
The Arrival II
About a year after the events of the previous encounter, Shortly after arriving, Rocky wasn't fearing that he would revert to his old destructive routine and instead he would do it for fun.
As a result, Rocky eventually left to find his place when he saw the damage he was causing towards Elena's. Rocky and Katy reunite shortly afterward, but having enough of the trouble he's caused.
Just then, one of the hunters attempts to destroy Rocky during the confrontation, and though he nearly succeeds, Rocky gains the upper hand and manages to both save his own life and manage to kill him. They then run into his old friends, who gives him a ride back to escape.
Afterward, Rocky was captured by God but then he was allowed to stay on earth as exile due to God's change of heart and Elena's legal ownership of him.