Gary Khan concepts

A character I created last year for school, part of a story I created called "Puzzled", the premise goes like this : An old ghost (Homer) residing in a mansion finds his quiet life of puzzle making interrupted when a loud, cheerful hiker (Gary) decides to stay in the place for shelter during a heavy thunderstorm.
I'm planning to model Gary in Maya to brush up on my modelling skills as it's been some time, since my internship was centered around illustration I had not much opportunities to model.