Sapphire Nova and Carousel Belle

Sapphire Nova (left)

Cutie Mark: A black and blue swirl ending with a star. 

Though she has no sapphire on her, she was named partially in memory of Rarity's cutie mark. She is the elder sister, with hair similar to her mother but colored like her fathers, and her inheritance was weak flame breathing ability and a specialization in chaos magic (courtesy of her father and grandfather). She also got her mothers fangs and father's eyes. Nova is spunky and feisty, all the attitude of Claire with less politeness and a bit of discord thrown in. Growing up she was constantly causing trouble and being mischievous and while Discord enjoyed having a new student everyone else was a bit less happy. She is rebellious and always pushing her boundaries as well as the patience of the royal guards, but at least in her own special way she cares about her sister. 

Carousel Belle (right)

Cutie Mark: A fountain with a pony statue. 

The granddaughter Rarity would've doted on if she's ever met her, and named for the Carousel Boutique Claire and Rarity both used to showcase their beautiful work. She inherited her mother and fathers horns and tail, but her hair is more like Rarity and Celestia's. Belle, or Carrie, was known as a lovely pony growing up, and the palace shielded her from too much attention but she still became known for modeling the jewelry and fashions of Carousel Boutique (for she enjoys fashion, if not quite much as her grandmother) throughout Canterlot. Her own personal hobby is decorating, and grew up studying in Cantelot..especially art, so oversees the creation of fountains and accent pieces to buildings and spaces as well as smaller scale decorating. She is a sweet and refined pony, but very serious about her work.