Source description:  
Nonpareil is an earth pony with an extreme case of wanderlust and a huge imagination. She loves romance and fantasizing about her wedding as well as her friends weddings, and is a big ball of girlish sunshine. She watched cartoons a lot and has a childlike quality to her. She is EXTREMELY volatile and delicate, which even throws sensitive Sound off at times. Shes one of Sounds closest friends, and currently attends a culinary school. She almost has some kind of baked good with her that she made that day to give out to strangers and friends. The whisk on Nonpareils shoulder isnt a second cutie mark.. Its a tattoo!
 
Quick Match is a super competitive, driven and active mare. Shes the closest to Sound out of their friends. They met during a production of Night Mare of The Opera they were both in. Quick Match has a secret love for the arts and musical theater, but her true passion lies in fighting. Shes a black belt and often travels Equestria in kickboxing competitions. She often tries to compete with Sound, which, at first, Sound needed getting used to. But it eventually became a regular thing for her, and due to this, Sound developed something of a snarky and sassy attitude which shows itself every so often. Quick Match loves pretty much anything that involves herself being active, so she often takes her friends to do things like jogging, playing buckball, swimming, and so on. Sound LOVES this, because she enjoys trying different things, especially with her friends. Its thanks to Quick Match that a pony can sometimes find Sound shooting arrows at an archery range or rock climbing somewhere. Sound often messes around with Quick Match, but knows very well not to cross certain boundaries with her. Even though Quick Match is rather small for a mare, Sound knows very well that she can kick the crap out of almost anyone.
 
Whirlwind is quite figuratively a whirlwind. She loves telling stories and talking. She really loves talking. A lot. But if told to take a breather or just stop and listen, she will. Whirlwind is incredibly loyal and looks up to Sound Barrier like an older sister, she even calls her sis sometimes. They have a similar, odd, sense of humor and will start to cackle at any little thing when theyre together. They are also VERY loud and obnoxious when theyre together, often disturbing the people around them. Whirlwinds hyper-activeness rubs off on Sound, but when it gets to be too much, Sound will often bring a stop to their craziness before it gets too out of hand. All in all, these three and Sound somehow all became very close, and despite going their separate ways after they graduated, they try to visit one another often and are constantly keeping in touch via letter or the internet. Funfact: all three of these guys LOVE reading.. But Sound isnt a big book person.