Aidan Carr (on the right), my protagonist for my upcoming comic story i'm writing called 'The Thin', suffers from Major Depressive Disorder for years. Isolation/being lonely makes it worse, but he gets treatment for it by taking medication and seeing his therapist, Karine Shelley. It's central to the story, as he is trying to manage between being this eerie, creepy masked vigilante The Thin in the city of Maylem and trying to heal as himself by going to therapy, in the middle of recovery.
another character named Talia Mannings (on the left), has PTSD. Aidan and Talia met in the same clinic building to seek their own treatment/therapy after many encounters coincidentally.

(in development. all art by Silvano Beltramo)
does any of your characters have a condition/disorder?
(this is almost based on real life experience...except the vigilante part of course lol)