Vonnegut is a bit of a shrewd, anything-for-personal-gain kind of man, who is often found tied up & bound by the main cast. In most cases, even after their help, he's hesitant to lend a hand or information in return unless forced into it otherwise.

Befitting of someone who will do anything for profit while being the most meek man around, Vonnegut sounds more in-line with an older merchant, with undertones & mannerisms reflecting what you'd expect from a shady businessman.

You can find a scene in which the character appears here.