After hearing of the news that a servant of Calamity Ganon was in Korok forest, Zelda decided to go there herself, without link or any of her friends when she saw you with a precious relic that was sort of a 'harbinger' of Calamity Ganon, holding it up in the air as you levitated, the summoning was happening! That is, before you were interrupted. She used her magic and summoned her bow of light, shooting an arrow at the relc and destorying it as you fell to the ground. Turning around while you had your hands and knees buried in the dirt you saw the princess with a determined expression.