People can call Frisk boy or girl because Frisk doesn't have a gender and can still be called 'she'.
Performs ballet. Wears the Old Tutu. Viewed as any gender people see her as but can still be referred to as 'they'.
Dances same moves as Mettaton, Glad Dummy and their cousin, Dummy.
He always uses Latin dance moves to try to kill you. You have to dance like him and dodge death traps.