Yandere Queen is a tag used specifically (your mileage may vary) for Yuno Gasai from Mirai Nikki
Overview
Considering her character itself is arguably the craziest character among its archetype (at least, the fanbase thinks so), this tag is created specifically for this character, due to her personality and her yandere qualities.
Related Tags
Future Diary Yuno Gasai Yukiteru Amano