Can a Vampire Also Be an Investigator?

"There are three steps to becoming a true investigator." "1. Shoot your prey, not just mysterious creatures." "Two, shoot your companions. Some unlucky ones will turn into monsters for various reasons." "Third, shoot yourself. This will allow you to choose a decent way to die for yourself." "Believe me, this is not an easy task. And you, my friend, Messemer Melianka, are self-taught and are a natural investigator! May I ask, are all vampires as cold-blooded as you, who can shoot at fellow humans, humans, or other mysterious creatures without hesitation?" Messer smiled politely and said, "The foundation's training is excellent. I have learned a lot from my colleagues inside. I still need to learn more about becoming a real investigator." "That's great, Messemer, you even have the potential to be a politician! Your empty talk is good enough to enter the parliament!" (Female protagonist, no system, micro-gram series)