Dismas is defined by his constant struggle to overcome his difficult circumstances. Having been raised by a highly volatile and aggressive immature Skulltitan lusus and having been forced to endure horrible physical tolls to satiate it, Dismas is primarily driven by a goal to escape his abusive home by means of eliminating his lusus and -- by extension -- its entire destructive species. He's dedicated his life towards such a goal and spends great time studying ancient footage of Skulltitans and the methods of their defeat.  I am looking for a voice that is mid pitch in tone but pretty raspy then again something higher pitched and annoying might also work, try either to your liking.