OH GOD SHANA IS HOT
From lurkmore wiki
Refers to the heroine of the anime Shakugan no Shana. Shana's badass personality and habit of yelling "Shut up, shut up, shut up!", along with a propensity of the animators to draw her in swimsuits, endeared her to fanboys on /a, although the fact that she clearly fits into the loli category precludes the meme from spreading into /e/ or /h/. Also seen as OH GOD LOUISE IS HOT, referring to the female lead of Zero no Tsukaima, who is pretty much acknowleged to be Shana with a color-palette swap, the serial numbers filed off and a riding crop replacing the sword.