Esmeralda is a villain that appears in the middle of the series, she is the younger sister of Herlock. She is out to get revenge for her brother, who the heroines defeated.
Throughout the series, Esmeralda tries to foil the plans of the three heroines. She bears a crush on Joshua and will flirt with him if she sees him, she also refers to him as "Priest Tama". Unbeknown to her,that he is affiliated with the very girls she is trying to defeat.