Please, no tagging an image yandere when there aren't any visible traits of such in the image itself. All there is in this image suggests nothing but deredere, no yan.
Try to adhere to the Danbooru tagging rule of thumb: "Tag only what you see, not what you know."
read the manga, the anime is just about the half of the story
On the other hand, had the anime gone to Season 2, things would very likely have gone differently.
With Kurama dead and Kouta getting his memories back and talking with Lucy (she didn't tell him about the Voice, so there's definitely more explaining to do, but still), there's not really a way for the last volume of the manga to take place. The final ending would pretty much have to be anime-original.