Satou (happy sugar life), Shion (when they cry), Fukusuke (color recipe), Mayu (from the song "an earnest unrequited love, wanting to make it bear a little happiness" and its follow up song), and Yuno (future diary). All these though are more so because I have introjects of those characters (I have DID).
Otherwise, I'd say Ha Yan (head over heels), Soushi (inu x boku ss), and maybe Yoseob (an uncomfortable truth)? It's been a while since I read it. Possibly a few more that I'm forgetting.
Unironically, Ayano Aishi to an extent, I relate to the emptiness, even if I am not completely emotionless. I am still not super familiar with the yandere subgenre so I don't know if there are other characters that would be more fitting of me.
I can relate to her emptiness. Without a love, everything can't help but seem more grey.
