Sothis

Sothis (Japanese: ソティス) is a mysterious character in Fire Emblem: Three Houses and its spin-offs. She is an amnesiac girl who can only communicate with the protagonist, Byleth, telepathically. Initially appearing in Byleth's dreams, Sothis guides and influences them, granting them the ability to manipulate time. As the story progresses, she gradually regains her memories, revealing herself to be the goddess of Fódlan, revered as the "Progenitor God" and "The Beginning". Sothis possesses immense power, including the ability to control time through "Divine Pulse". She plays a crucial role in the game and is deeply connected to Byleth's fate. Her personality is youthful and sometimes mischievous, yet she possesses the wisdom of an elder. Despite her youthful appearance, she speaks and acts like an old woman. Ultimately, she merges her power with Byleth to aid them. In some endings, Sothis reappears in different forms, remaining with Byleth forever.