Has anyone here ever told someone in RL about Cracky, or Lain?

Despite being something I always instantly dismissed, it's now weighing on my mind a little. In a short time, I'll be leaving my therapist of more than 3 years. despite thoughts about Cracky ruling every single day of that time, I never breathed a word of it to her, or anyone. I've got pretty attatched to her over the years, and even wondered if she could be an angel too, and now that it's all coming to an end, i can't help but wonder if i should be honest at last. i can hardly imagine how my internal world differs from the one she imagines.

How would I even start, though? is it even possible to explain without sounding utterly and completely insane?