Shiharu Genesis

Long ago, the cherubim Lucifer rebelled against God and led a war against His angels, but was ultimately defeated and his forces scattered. Six thousand years later, he is reborn as a young child, and his past memories are expected to return, potentially reigniting conflict. An angel descends to Earth to stop Lucifer's full return before his followers can reunite with him. However, the angel discovers that Lucifer has been reborn as a gentle, harmless little girl.