Final Quest

"On my way here, I met a man named Rido," you say boldly. "He told me that the nymph he fell in love with, Testella, was kept in this forest under enchantment, and only this necklace can save her." You raise the necklace above your head. "Tell me how I can release her from the enchantment!" The nymph smiles lazily. "But of course," she murmurs. She snaps her fingers, and five identical looking nymphs appear, side by side. "All you have to do is choose the one who is Testella, and put the necklace around her neck," the nymph explains to you. "Of course, if you guess wrongly, then you will lose your memory, and leave this place forever." Which will you choose?