—Sothis talking to Byleth
Using her power to rewind time, Sothis saved Byleth's life from bandits. She does not physically appear, appearing only inside Byleth's mind, so nobody except them knows of her existence. She grants Byleth the ability to use her time manipulation power called Divine Pulse. Sothis seems to have lost all recollection of her past.
Despite her youthful appearance, Sothis speaks and acts as though she were much older.
Sothis is the Greek name of the Egyptian goddess, Sopdet, who is the personification of the star, Sirius.
- Sothis' artwork shows her with the Sword of the Creator.
- Sothis shares her English voice actor, Cassandra Lee Morris, with Julia and Clarisse from Fire Emblem Heroes .