Aurora Suya Rhys Kaymin, better known as Princess Syalis, is the protagonist of the anime series Maoujou de Oyasumi (Sleepy Princess in the Demon Castle). She is a human princess who is kidnapped by the Demon King and held captive in his castle. Despite her captivity, she is more concerned with getting a good night's sleep than escaping. Her relentless and creative pursuit of comfort often causes chaos for her demon captors, making her both a nuisance and a source of comic relief throughout the series.