Cassidy O'Reilly is the daughter of Blacksmith O'Reilly, who was once a vessel for the Daylight Owl. She was saved by Steven, who stung her with the Great Scorpion's stinger. Blacksmith O'Reilly had gone and saved her from the Nether, gaining a scar in the process. The cause of his scar is unknown. It is assumed she is a psychic, due to her strange nature in the end of Ghast Invasion, Season 2, Episode 12. She also has the power to heal which was a gift from the stoneskin.