I can see where you're coming from. I'd totally forgotten that Douglas actually plays the piano. I can see Carolyn as a cellist or something like that - heavy, rounded and surprisingly voiciferous. Martin reminds me a lot of the oboe itself in that he can be a bit shrill and finicky but ultimately can also be melodic and delicate. Funny thing is, an orchestra often tunes their instruments after the oboe, meaning it automatically has a leading position in the orchestra and that no orchestra is complete without one - see where I'm going with this in reference to our one and only captain? :-)
/Belelaith