"Flash cg" probably refers to a Flash-based image, maybe a fan-made image or a piece of computer-generated art. "FF7" is obviously Final Fantasy VII. Tifa is one of the main characters. Age-wise, 20 years old. The terms "core wet and abnormal" are a bit unclear. Maybe "core wet" is a typo or a specific tag? Could it be "wet" as in a water effect, or "core" referring to a key element in the art? "Abnormal" might relate to the style being unconventional. "Engl the game" likely means English language version of the game.