This isn’t a terribly big suggestion, but “Psycho” feels a bit out-of-theme for the game. I suggest renaming the Psycho King to the Mad King, which is much more setting-appropriate.
(Googling, the word “Psychosis” only dates to the 1850’s, and “Psycho” as a slang term for it is even more recent - the first recorded usage of the term is from 1935! Whereas “The Mad King” is of course a term that has had a lot of historical usage.)