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.

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.