To contrast Vash from the typical heroes in action films, Nightow portrayed him as a pacifist since he did not want his lead character to be a murderer. Throughout the story, Vash avoids killing enemies by disarming them and avoids inflicting mortal wounds during combat. His cheerful personality was used to highlight this trait with his catchphrase being: "Hey, sorry. Love and peace?" Other elements of the manga were based on real life. Wolfwood's name was taken from the lead singer as his image for the priest. He is also modeled on Tortoise Matsumoto from the band Ulfuls.