Her personality is currently unknown. However it is shown that she's a great catwalk model, she also used to be afraid of unicorns and pegasi, in the movie, she was seen wearing a Unicorn Anti-Mind-Reading hat, made by the Canterlogic factory.
But after magic returned, she accepted friendship between all three pony kinds.
She is a pale lavender female earth pony, her mane is red with light pink highlights and she has hot pink eyes. Sugar also wears glittering makeup and red eyeshadow.