اراشی کیشیو

A foundling girl raised by Shintō priests at Ise Jingū and the the Dragon of Heaven most immediately in touch with Princess Hinoto. Called the "Hidden Priestess of Ise," her specialty is sword fighting, a massive sword emerging from her left hand. Despite her cold, stoic front, Sorata falls in love with her, and ultimately she comes to reciprocate.

In Tsubasa Reservoir Chronicle

[Spoiler: In the Republic of Hanshin, Arashi is a retired miko married to Sorata. In Tokyo, she's a miko who can foresee disaster and is one of the seven fighters of the Tower faction.]