The Sirens (South Park)

The Sirens are sirens once demons, who are satan's daughters and they are set to appear in South Park: Bigger, Longer, & Uncut 2.

Backstory
The Sirens (includes: Stella, Kylie, Kendra, and Erica), were once Satan's daughters, they made a deal with a witch so they made their voices stronger, eventually, they turned into sirens, Satan was heartbroken, so Satan banished them to earth so their magic won't prevail, their gems on their chest eventually turned into pendants.

The Girls
The Sirens include 4 girls, Stella (black hair and shades), Kylie (feminine jewfro red hair), Kendra (curly blonde hair) and Erica (brunette hair).

Stella
Stella is power-hungry, impulsive, mean, and cold-hearted

Kylie
Kylie is smart, dissaproving, and abrasive

Kendra
Kendra is air-headed, energetic, and optimistic

Erica
Erica is shy, timid, passive, and somewhat impatient