Some of this page is derived from the Friendship is Magic Wiki.The original article is at Suri_Polomare.
Development and design
Suri has a light pink coat with a purple mane and tail. Her cutie mark is of three colored buttons (purple, aqua and light yellow) in a triangular formation. She is shown wearing a two-tone blue crossed scarf and a headband holding up her mane in the back. She speaks with a soft but distinct upper-class Manehattan accent, similar to that of Applejack's Uncle and Aunt Orange.
Depiction in the series
Suri meets Rarity when she's the last to arrive with her dresses at Prim Hemline's rehearsal. She is stated to have met Rarity before at a Ponyville knitting competition, although Rarity at first cannot put a name to her face. While backstage with Rarity, she takes a look at Rarity's dresses, complimenting her on her designs. Appreciating the material Rarity used to make the dresses, Suri asks Rarity for a swatch of the fabric to fix up some of her own dresses. Rarity happily obliges and gives her an entire bolt of fabric.
The next day, Rarity is again last to show up to the event. As Rarity peeks onto the stage, she sees Suri having her dresses judged by Prim Hemline. She then notices that Suri had completely duplicated her designs overnight, using the same fabric that she used. When confronted by Rarity about this, Suri explains that "it's everypony for herself in the big city".
When Rarity later rushes back to the plaza to thank Prim for the opportunity, Suri and Coco tell Rarity that Prim is "furious" and that she should stay away from her for a while. Once Rarity's friends turn up, it is revealed that Suri also told them that Rarity lost the competition. After Rarity accepts the defeat and leaves with her friends to see Hinny of the Hills, it is revealed that Suri lied to Rarity and her friends about the competition's outcome and that Rarity had indeed won. Coco quit being her assistant and gave the trophy to Rarity.