Siestina has pearl pink skin with slightly darker mouse ears and a thick tail, one ear being bent over. Her dark pink eyes are usually shut or squinted, and she has matching colored hair that is nearly waist length with slightly wavy forelocks and thick, straight cut bangs.
Her attire consists of a dress matching her ears and tail with an apple design and a frilly white collar, along with pink shoes that have a ring of white on the top.
A sleepy-head who is known for having the sweetest, most adorable personality of all the Glimmies. She is comforting and supportive, and can give amazing hugs that perk others up. She isn't very talkative and a bit withdrawn, but she is very inviting with her warm hugs.
- Her name is based on the word Siesta, which usually means to go to sleep, and possibly girl names like Tina, or Christina.
- Her korean version is called Estina.