Shakugan no Shana - Itou, Noizi Takahashi, Yashichiro

Invaders from the Crimson Realm have descended upon Earth looking for something called the Power of Existence. Whoever possesses this power will control the very fabric of existence. To the rescue comes an otherworldly young girl with fire in her eyes. She may be cute and petite, but she's endowed with enough preternatural strength to save the entire universe. Plus, she's got a really big sword!

(Source: VIZ Media)

The first two volumes of Shakugan no Shana were released in English by VIZ Media on April 17 and October 16, 2007 respectively.