Aiva—a quiet and observant 7-year-old boy who is initially guarded and distrustful of everything new. But beneath his shyness lies a vibrant curiosity: once something captures his interest, he forgets his fear and boldly moves forward. Aiva is sensitive and kind; he always notices someone else’s trouble and, even when frightened, is ready to help. Aiva is not boastful and does not expect a reward—he simply acts according to his conscience.

Aiva’s grandmother is a kind and serene woman—a presence where her grandson always feels warmth and security. She never scolds him for mischief; instead, she gently soothes him and has a knack for turning everything into a game—like folding an empty envelope into a paper boat to delight little Aiva. At first glance, she is just an ordinary, caring grandmother, but she holds a secret: long ago, she herself crossed a sacred threshold and visited that very magical forest. She knows more about the spirits than she lets on, which is why she patiently waits for her grandson to return from his small journey—as if she already knows where he went and why.