Tsukuyomi

"God surely is kind, isn't he? He brought two people who never had a mother in the real sense... and a mother who gave birth to soulless children... together. Perhaps... there's more to that than meets the eye."

The Crow Girl is an unnamed minor yet pivotal character in the Oshi no Ko manga series. She is a seemingly supernatural being apparently aware of everything that transpires within the story.

Personality
The Crow Girl is an enigmatic being whose motivations and goals are shrouded in mystery. She normally bears a teasing demeanor, being almost always seen with a smile on her face. She has also shown to be manipulative, setting others on the path she lays out for them. To do so, she draws them in by claiming to be aware of their desires and offers them vital information to help achieve their goals. However, she keeps key details to herself as to not make it too easy for those she is guiding, claiming that is "[their] role".

Private
The Crow Girl is first seen after Aqua tells Gorou Amamiya's backstory to Akane. Having seemingly overheard the conversation despite not even being in the same area, she mumbles to herself how "god must be kind to have brought him, Ruby, and Ai Hoshino together", though she also notes that there "might be more to it".

Trivia

 * A popular fan theory is that the Crow Girl is, in fact, the Japanese deity Yatagarasu.
 * Yatagarasu is known as the "eight-layered crow", similar to how the Crow Girl is constantly surrounded by eight crows.
 * Yatagarasu serves as a guide to those who the gods deem worthy, like how the Crow Girl guides Ruby onto her quest for revenge.