Sirena

Universe
Sirena exists in the Monster High universe and the Monster School universe

Monster
Siren

Powers
water manipulation, bad luck singing, invisibility, ultimate seeing, and mind manipulation on weak monsters and humans

Looks
Sirena human form left monster form right

Home
Shallow waters on earth

Personality
Moody and hates humans, a prankster with an attitude, and isn't comfortable around new people.