Once Upon a Time, Regina Mills was a simple princess who loved to ride and care for horses. Also, at the time, she was deeply in love with her now deceased fiance Daniel, until that fateful day. Regina had saved Snow White from death and they became acquainted but then Snow White witnessed Regina kiss someone other than her arranged fiance. Even though Regina asked Snow White to keep the secret, Snow eventually told Cora. Cora later killed Daniel. From that day on, the good and innocent Regina turned evil. The Evil Queen is born.
Before Evil
After season five of Once Upon a Time, Regina Mills untethered her darkness from her. The result of this is the reemergence of the Evil Queen.
The Evil Queen
Her endgame? Proving to Regina that in order for Regina to succeed, she must embrace her darkness.