She can be renamed by players at the beginning of the game. Though she bears a slight resemblance to Pony, (minus the parting twintails at the end of the ponytail and having a more orange tint to her hair) and shares a name with the blonde protagonist from earlier Harvest Moon games, she is a separate character from either of them. In later games she is known as Sabrina.
Hiking her way through the mountains one day, Claire becomes caught in an unexpected snowstorm, and finds shelter with the help of a faint voice. When she awakens, she finds and helps a kindly Harvest Sprite buried under the snow, who tells her all of the seasons in the valley have vanished except for winter. To return all 4 seasons to the valley, she’ll need the help of the villagers, the Harvest Sprites, the Harvest Goddess, and the King of the Underworld.