Siren is a 2010-introduced and prose-only character. She is a siren and a teacher at Monster High. She hosts Voice Training, which is one of Monster High's night classes.
- Mid October, 2010: Siren makes her diary debut in Holt's 'Basic' diary.
- January 29, 2013: Siren's name is revealed in Ghoul Spirit: A Monster High Doodle Book.