Sachi Tainaka (???? ??, Tainaka Sachi?) is a Japanese singer who is best known for her vocals in the opening songs of the anime version of Fate/stay night, and her amazing voice range (3 octaves), as shown in the intro of "Saik? no Kataomoi". She states that she was singing by a river, when she was suddenly able to sing extremely high notes. Her name is written in katakana, but her real name is in kanji: ????? (Tainaka Sachi).