Weird Sprite Compression in Battle High 2

[miru]

I've been trying to rip the sprites from the game Battle High 2, but when I put the game through a Unity asset extractor, the sprites look weirdly transparent; as if they're nothing but faint, glowy outlines rather than full sprites. I did extract the "Texture2D" folder from the game, but this is the result;



What's with the "DDSD_Pitch" thing? All the sheets have that extension at the end, too. I WAS, however, able to find one intact sprite sheet;



The sheet is labeled as "Aroon", but it matches a different character in the game. Can anyone help here?