Princess Syalis is abducted from her home of the Nation of Goodereste by Twilight the Demon King. Despite the horrors lurking in the Demon Castle, all Princess Syalis wants is a good night’s sleep.
And there's no replacing it, as it's one of a kind.
.ولا يمكن استبدالها كونها فريدة من نوعها
Außerdem ist er
einzigartig und irreparabel.
Y no hay manera de reemplazarlo,
porque es único.
Et c’est le seul qui existe,
en plus.
Ed è anche insostituibile,
 essendo unico nel suo genere.
E não há como substituí-lo,
pois, é único.
Ещё и уникальная — 
вторую такую не найти.