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Like the title says, these are Melody’s siblings! Her twin sister Saprana Allegro Aria, the 3rd most popular pony of pop (the first being Countess Coloratura and the second being Sapphire Shores), her older brother Alto Baroque Aria, frontpony and lead singer of the rock band Pony! At The Disco, and her younger sister Chorus Forte Aria, who has no cutie mark yet, but everyone in their family has music related cutie marks and talents.
 
Saprana and Melody are very different. Saprana is bossy, entitled, a showoff and expects people to treat her like a star. Alto is a punk who thinks he is super cool. He is cool, but he’s like suuuper aware of it and thinks he’s suave and charming. Chorus is torn. She spends more time with Saprana but she respects Melody’s decision to give up fame to be happy as a small town music instructor. Chorus loves the perks of her siblings and parents being famous, but Melody is nicer to her and when she commits to being there for Chorus she comes through.
 
Melody’s father is named Mezo Prelude Aria, he is a conductor for the Manehattan Orchestra, and everypony on his side of the family has had music related talents and cutie marks, including his mother Nonet Hymm Aria, who was known as the queen of Bridleway back in Manehatten’s hayday (Ha! Hayday! Unintended pony pun!). Melody’s mother is Harp Lied, a very famous Bridleway star. Everyone on Harp Lied’s side of the family has been saying for generations that they are related to King Bullion and Princess Platinum, the old Unicorn royalty, but Melody says that’s a bunch of horse manure that her mother’s family made up to make themselves seem better than everypony else. Despite that statement, Melody’s parents and siblings spout it like it’s the gospel truth.
 
MLP:FIM = Lauren Faust And Hasbro  
Melody & Melody’s Family = Me.  
Bases = Equine-Bases StarOblivion softybases