My Character

The role I will be playing in my devised piece is an author, the idea is that the author is writing the story that needs to end happy because he needs to please 'him' which when presented to the audience should be suggested to be someone above the author making him write the story but our idea is that the author is a bit mental and 'him' is himself, the author is his biggest critic and eventually drives himself insane with his failed story and kills himself.            
My character needs to start off calm and collected but still have a hint that he is a bit mental so I don't seem like I jump to a different character half way through. Also we want the audience to connect with the author some how, maybe feel sorry for him so when he does hang himself its very dramatic and maybe even emotional.

This is what I want the author to look like, this is how I see the author, very smart and slick but if you look closely into this mans eyes it just seems some what mysterious and angry. This photo has some old and modern qualities to it which is also good as my author is set near enough modern time but dresses like he is in 1930's as the character has some connection to that time period.