What are Captain van Toch's character traits in the novel, War with the Newts?

Captain van Toch, the wily South Sea captain, is described in the following way; his appearance (portly), manners (informal), habits (drinking), temperament (choleric), language (cursing), and trademark (garrulousness), are both true to the image and dis torted out of proportion so that, while representing his stock, he also becomes its gentle caricature.