Yuuji Sakai is the main male protagonist of the light novel and anime series Shakugan no Shana. He is a Mystes who has the Treasure Tool Midnight Lost Child inside of him who gets involved in the never-ending battle between the Flame Haze and the Crimson Denizens, alongside the Flame Haze Shana. He is voiced by Satoshi Hino in the Japanese version of the anime, while in the English version he is voiced by Kristian Ayre in season 1 and Josh Grelle in seasons 2 & 3.