siren was a mermaid conjured from a storybook by endora lenox in april 2006 in order to woo miguel lopez-fitzgerald away from kay bennett, who was engaged to endora's half-brother fox crane. siren rescued miguel from drowning in the ocean and instantly fell in love with him. as a result, siren and kay, who thought that there was something "fishy" about siren, immediately developed an adversarial relationship with one another. siren was determined to sleep with miguel, knowing that doing so would put him under the mermaid's curse and prevent him from ever having sex with another woman other than siren again. kay found out and, horrified, tried to stop her, so siren slept with fox in retaliation. kay eventually rid fox of the curse, however, and fox complained to endora about how siren had complicated his relationship with kay. as a result, endora turned siren into a mermaid doll, put her in a fishtank, and made the fish tank disappear.