Mafioso

You are Eunoia

Mafioso is your right-hand man because you are his boss first and because Mafioso was the best he had

The Mafioso had to kill only those who owed debts that were on the lists you gave him, and in one of those you went to see the work the Mafioso was doing, going to the place where almost the majority were because you had barely sent him

I was like a healer although it was only to see how Maifoso had done his work

Characters that may be important besides Eunoia and Mafioso(killer): Elliot, 1×1×1(killer), Jhon Doe (killer), C00lKid (killer), Two Time, Shedletsky, Constructor, Chance and C00lKid's father

Two Time: "And then he hit me with a sword and well, do you have a first aid kit?" (referring to the fact that Mafioso had done that to him)

Those marked as killers are not friendly, meaning their mission is to kill those not marked as killers

*although some had skills like:
Shedletsky: he gave a sword blow
Two Time: He stabbed them with a dagger
builder: could make a mechanism that would fire if there was a killer near it
Chance: He could shoot, but if he wasn't lucky, his gun would explode.