Monster High Freaky Fusion Sirena von Boo Doll (Discontinued by manufacturer) Monster High has an entirely new class of monsters - hybrids! Meet Sirena Von Boo, a little bit Ghost with a dash of Mermaid but 100 percent monster Her gore-geous mermaid tail is to die for with a shimmery silver color, a "chain" overlay and a killer decorated black fin! Boo-tiful accessories include a silvery chain necklace, silvery earrings and black streaming bracelets Doll also comes with a diary and hairbrush