Solar Flare

Solar Flare is the son of Sunburst and Starlight Glimmer. He is chill with his father but when it comes to his mother him and his mother are so similar that It causes them to butt heads quite frequently. His mother would occasionally go off on him and then 5 minutes later would just tell him whatever and to go do what he want's to do.

His older sister is Luster Dawn who is the new student of Twilight Sparkle, because of this he and Luster Dawn don't see each other often except when he goes to visit his friends. When he learned of his older sister going off to study magic under princess Twilight he started trying to learn magic himself on his own and one day while in his parents study he accidentally starts moving the sun around outside and while this is going on Princess Celestia sees the sun and starts trying to find out why it is moving around so much.

Sunburst comes into the room and sees him in a bright burst of flame while this is going on but the flame is not hurting him. Sunburst screams and then faints and then Starlight Glimmer runs into the room and cast's a water ball spell and she yells to stop moving the sun and smacks him and it snaps him out of his trance and she looks at him and realizes his cutie mark appeared and that this filly is extremely powerful. 

She ends up getting Princess Celestia to come to her home and Princess Celestia decides to take him on under her wing as her student. From that moment on Princess Celestia has been teaching him magic but realizes that he is similar to Sunset Shimmer and is quite hotheaded and wants to do more than just read a book and practice small spells. 

Because of this she fears he may end up becoming evil and tells him that until he can control his temper he is not allowed to practice any larger spells. Due to this he starts practicing spells behind her back.

One day while he is in the castle he runs into Starry Sky and he is reading Star Swirl the Bearded's Journal. Starry Sky comes up to him and asks if she can read the book when he is done and he ignores he at first. She then asks him a second time if she can read it and he mumbles under his breath "yeah.... whatever give me a second". She then asks him what he said not understanding and so he then finally goes off on her and tells her to leave him alone and that he will be done with the book when he's done with it. 

While reading Star Swirl The Bearded's Book he finds a section on changelings and it ends up spooking him and he throws the book across the room and in embarrassment that someone might have seen him he runs out of the room. 

He is a very hotheaded pony growing up and never listens when somepony tells him not to do something. He isn't always around his friends because he loves learning magic, he likes to hang around Trixie quite a bit due to this and whenever he goes to ponyville he stays with Trixie due to the fact that Starlight Glimmer moved to the crystal empire with Sunburst when they had gotten together. 

Trixie is like an aunt to him and he picked up some of the... unwanted qualities that Trixie had from when she was a young adult. 

He has a bad relationship with Black Heart because of the journal entry from what he read in Star Swirl the Bearded's Journal when he was a younger colt. Anytime he see's Black Heart he is absolutely terrified of him so when Black Heart reveals his plan and intentions he tries to shoot a fireball at Black Heart and it doesn't work and then he ends up shooting a fireball at Chrysalis and Tirek's Statue and destroys the two. 

Due to this Black Heart gets extremely angry and goes off and then says "If you like fireball's so much then why don't you take this one" and shoots a fireball at him and destroys his horn.

He ends up being more afraid of Black Heart after this and because of this Black Heart likes to fuck with him often and slowly cause Solar Flare to go insane thinking that Black Heart is after him.