Homing Curse

The Spread Shot of Reimu Hakurei, who has almost reached the end (a Touhou LW original). Sentient tools are shot out from her Armored Yin-Yang Orbs in this attack.

The Hakurei Shrine Maiden
Supposedly, Reimu is the 13th Hakurei shrine maiden. It's said that Gensokyo came into being roughly 1,000 years ago, but Hakurei Shrine has existed since before then. Assuming the shrine maidens of the past had long life spans, the line of Hakurei shrine maidens could be unbroken, with the title being passed down the generations of a singular family. However, there is a record of Aya Shameimaru making a comment that implies this might not be the case.

Regardless, there's also a chance the shrine was under the care of someone other than a shrine maiden for a generation―maybe a priest. As of right now, however, there's no historical record to suggest that.

Perhaps Mizuchi Miyadeguchi knows more about all of this.