Royal advisor and guardian to Ozymandias. Don't let her simple appearance fool you; Jasmine's role is very important to Ozy's well-being, and the extent to which she is responsible for the Rat-King goes much deeper than even the King herself is aware of. With a humble and protective disposition, Jasmine behaves like a noble lady would, and sometimes finds herself at odds with Ozy because of the latter's naivety. She is mature and reasonable, however, she is a creature with a lot of debts to shoulder. It isn't clear how old she is, but she is definitely different from other ordinary rats.

Other than Ozymandias, she seems to hold a special relationship with Kilo of the Thousand Tales, and is one of the few beings close to Liadan of the moving library. She seems to adamantly dislike the Ravenous Prince.