Dabi from my hero academia x reader fanfic. Basically, you're a psychologist and become a villain. No there's no patient x psychologist relationship. Also, there might be minor manga spoilers since the story is placed in the Villain Arc (ch. 210-230 i think?) but even without reading the manga you can understand the story. I recommend listening to "Demons" and "Believer" by Imagine Dragons while reading ^^ they're such a Dabi songs imo.