Sirena Von Boo

Sirena Von Boo is an upcoming character in Monster High, set for release in or shortly after the first half of 2014. She is one of the fusion creatures who'll star in "Freaky Fusion", being part ghost, part siren.

Timeline

 * November 19, 2013: Mattel requests the trademark for Sirena Von Boo.
 * December 27, 2013: Preview photos of the Early 2014 lineup are leaked to the fandom, revealing Sirena Von Boo.
 * April 03, 2014: Sirena Von Boo's profile art is revealed through the website's banner update. The link between her name and appearance is officially confirmed.