Why Did Iduna Call Elsa?

The mysterious siren call Elsa began hearing three years into her reign was that of her mother. ... Elsa discovered that the call was used by Iduna to summon the Wind Spirit to save Agnarr. Elsa also discovered other memories of her mother, from Elsa's own childhood and those that took place before she was born.

Was Elsa's mom the 5th spirit before Elsa?

While other people in that scene appeared only in her memories, she actually heard her mother's voice singing to her. The only explanation for this is that Iduna was previously the fifth spirit, and thus her spirit still lies within Atohallan. Second, Elsa's powers have to come from somewhere.

Did Iduna call Elsa?

Disney's Frozen 2 features Elsa (Idina Menzel) hearing a mysterious voice calling to her throughout the movie, and despite confusion among audiences it has been definitively confirmed it belongs to her mother, Iduna (Evan Rachel Wood).