Lucifer in mythology is known to be the creation of Satan, the angel who disobeyed God and took 1/3rd of the angels with him into hell. Hence the phrase “fallen angel”
In Christianity, Lucifer is said to have affiliations with the devil, but he is also known to be referred to as the “morning star”
Quote from Wiki:
In Islam, the account of Iblis follows the Lucifer motif. Iblis is banished from heaven and becomes Satan by refusing to prostrate before Adam. Thus, he sins after the creation of man. Satan then swears an oath of revenge by tempting human beings and turning them away from God
In Judaism, he was seen as a fallen angel
