Harmony Burns is a 2011-introduced and book-only character. She is a fire elemental and a student at Merston High. She is at least 16 years old.
Harmony is the older sister of Heath Burns. Because in the Monster High books there is no familial relationship between the Burns and the Jekylls/Hydes, Harmony is not a cousin of Jackson/Holt.
Heath, Billy, Frankie, and Brett are given a ride to Salem by Harmony. Where There's a Wolf, There's a Way