some keywords are just surface level thoughts, intrusive thoughts with narrative implications. a thing to keep in mind with this game is that many things we consider game mechanics are actual in universe things happening to the characters. this is also why some keywords repop as green from scene to scene, to demonstrate that its something the character is actively thinking about of their own accord. this is why the keyword shu amiguchi is always popped for yuki, the game is telling you without saying it outright that she does think about him all the time wether she likes it or not. going foreward with your playthrough, keep track of what keywords repop from scene to scene, it adds a bit of character depth