Age: mid-20s (mentally), 15-16 (current body)

Nickname: Athy
Height: 163 cm

Athanasia de Alger Obelia is the main protagonist of Who Made Me a Princess as well as the first princess and only heir to the Obelian Empire. After reading a book named "The Lovely Princess," the protagonist falls asleep with sleeping pills and finds herself in the infant body of Athanasia, a side character who is executed by the emperor, her father, when she's 18.

Athanasia is the daughter of Emperor Claude de Alger Obelia and Diana, a dancer he deflowered after meeting her at a royal banquet.