She was once known as the "Guardian of Soul," a being who protected the souls of others. However, after her friend—"Strawberry of Love"—reproached her for failing to protect her during a traffic accident, the Guardian of Soul grew resentful. She killed her friend and used addictive substances to consume her soul (though, in reality, the friend had died from a drug overdose). She transformed into a "Soul Beast" and now frequently tricks others into using those substances, devouring their souls to gain power.