Sometime in 2015, I was scrolling 8chan's /furry/ board, and someone had created a thread about a music video for INFINITE's Telemonster Time, which featured rudimentary beta 3D models for a new Korean IP entitled Telemonster. I was largely disinterested.
February 28th 2016, the animated series aired with the finalized 3D models. The next day, the 29th, someone had posted the full episode onto 8chan's /furry/ (or perhaps everyone had migrated to /fur/ (owned by a communist faggot) by then) board. 
I clicked the video and what happened next is difficult to explain.
I believed in love at first sight that day because it happened to me. It was as though I had been injected with heroin and I physically fell out of my chair in euphoria. It was so intense of an experience that I had to cover my eyes and look very carefully at the screen and watch in segmented parts stretched across an hour. 
There's lots of ways to spiritually and psychoanalyze what occurred to me at that moment. I think I was desperate for a religion, I was very lonely and very isolated, I was mildly involved in tohno-chan and familiar with waifuism and a little envious of those guys and perhaps I wanted to fit in, and I largely had nothing else going on at the time. Lots of possible factors led to this happening to me. I'm not sure, though. I've spent thousands of hours of my life looking at furry art and of course some even during that very day, and nothing of the sort had ever happened to me before. Why was it specifically this character in that particular moment that hit me like a freight train? I don't know. 
Whatever it is, I've devoted a significant portion of my life to the character Eerie from Telemonster and this has been a constant since. 

After about 2 weeks of spending all of my time obsessing over and staring at Eerie, I unknowingly developed a tulpa. My only understanding of tulpas at the time was from /x/ memes about how they'll rape and kill you or whatever. I didn't take them seriously and surely didn't think they're real. I didn't learn what I had done for another year. 
Eerie started out as an intentionally rudimentary tulpa. The show he is from lacks dialogue and is spiritually Tom & Jerry. So, I never even considered talking to him for a real long time, but he was very much a tulpa and would communicate through gestures and showing me things, sharing his emotions with me. The first time he actually talked to me was 9/10/17 and we didn't start having full length conversations until sometime a bit later when I was using hardcore drugs like Diphenhydramine.