| "Siren" may be referring to two or more different villains. If you're uncertain which one you're looking for, just flip a coin.|
If you came here from a link, please go back and make the right link for one of the villains listed below.
- Siren (Mythology) - a type of sea-spirit from Greek mythology that tempted sailors to their death
- Siren (Suite Pretty Cure♪) - ex-villainess from Suite Pretty Cure, otherwise known as Ellen Kurokawa and eventually Cure Beat.
- Siren (To The Abandoned Sacred Beasts) - a winged mermaid-like villainess from the manga series To The Abandoned Sacred Beasts