クセルクセス・セルラ・ブリート

Imperial Princess of the Northern Central Empire.
She was welcomed as a member of the Imperial Family because she inherited the blood of the first emperor and developed golden eyes. She is a genius in mathematics and engine technology, and was sent by the Northern Central Empire to play a key role in the desert city's plan to become a prominent engine city.
She is engaged to be married to Harut.

She's the protagonist of the fifth chapter.