I know that katakana is used for foreign loan words, accented speech, robotic speech, and certain proper nouns (ie: トヨタ), but what does it mean when used for normal Japanese words?
Specifically, I was skimming the first volume of 咲 (just for fun, since my Japanese is nowhere near enough to actually handle Seinen) and I saw キレイな子. Why is きれい written in katakana here? The only context here is the protagonist saying it when she sees a pretty girl.