Justina gu is the former princess. After the disappearance of her mother she  suspected that her step father had something to do with it but didn’t have any proof for it so she secretly left her empire living traveling as a nobody. In Justina mind, she is not the noble imperial princess, nor the graceful owner of the Pluvial Pavilion.
She is the Frosty Shadow who vows to bury the enemies in the snow or the lonely Winter's Grace who is eager to find her mother back.

nickname: winter's grace