A shop for killers manga is appealing because it offers a dark and gritty world, combined with intense drama and mystery. It's a refreshing take on the usual manga genres.
Since it's an 'untold story', it's hard to say exactly who the killers are. But they could be serial killers, or those who committed heinous one - time crimes. They might come from different parts of the world, with different motives for their killings. Some could be motivated by greed, while others might be acting out of some sort of mental illness or personal vendetta.
The real killers could be a group of people who were part of a larger conspiracy. They might have been working together to eliminate certain individuals or groups in order to further their own interests. For example, if there were competing business interests or power struggles, they could be the ones behind the killings. They may have used underhanded tactics like poisoning or staging accidents to achieve their goals without getting caught easily.
Another possibility is that they could be a new group of dark wizards who emerge after Voldemort's death. They believe that by raising Harry, they can create a new order in the wizarding world. They might not be as well - known as the Death Eaters, but they are equally, if not more, dangerous.
In the real story of 'Killers of the Flower', the principal killers were white individuals. The Osage had significant oil wealth, and these men, desiring that wealth for themselves, resorted to murdering the Osage people. It was a case of extreme greed leading to heinous crimes. There were also likely some people who were involved in covering up these murders or were complicit in some way in the overall scheme to take the Osage's money.
As I'm not familiar with the 'killers knife in prey series novels', in general for novels with this theme, killers can have various characteristics. They may be highly secretive, living a double life and being able to blend into society unnoticed until they strike. The fact that they use a knife might mean they are patient, waiting for the perfect moment to ambush their prey. Also, they could be driven by some deep - seated psychological issues, like a past trauma or a warped sense of justice. Their actions with the knife are likely to be a manifestation of their inner turmoil and their desire to exert power over their victims.
There are many novels about assassins, and the following are some of the classics:
1 "Dark Censor"-Misty Rain Jiangnan
2. Full-time Killer-Butterfly Blue
3 "Sword Comes"-Beacon Fire Playing with the Vassals
4 "Three-body"-Liu Cixin
Lord Snow Eagle-An Outsider
6. Battle Through the Heavens-Heavenly Silkworm Potato
Peak of Martial Refinement-Momo
8 Blade-Misty Rain Jiangnan
9 Douluo Continent-Tang Family's Third Young Master
10 Dark Blade-Scattered
These novels were all about killers, with unique storylines and worldviews. They could be read according to one's preferences.