Hunter: When an Assassin Meets the Girl from Hell

A girl deliberately overlooked by the underworld because of its negligence transmigrates five years later, carrying a System with her, her resentment too great to bear. She also takes on another person's appearance. What will transmigrating to another world bring her? System: Ding! Mission unlocked. Host, please make a choice. Female Lead: Choose a mission. System: Mission One: Turn Hisoka into a normal person. Mission Two: Turn Chrollo into a pervert like Hisoka. Mission Three: Help Illumi find a wife. Female Lead: ... Is there a reward? System: ... Guess? At first, the female lead still has a little of an ordinary person's kindness, but she isn't a Mary Sue. Her abilities aren't especially strong, though they gradually improve. Later on, she becomes scheming, expressionless (wait, does that even count as a personality trait? Seriously!), and fond of snarky comments. She's a little selfish, and only gentle toward certain people. In short, this is the story of a girl wearing Enma Ai's appearance and a black-haired, expressionless assassin! The writing is lighthearted and a little snarky. If that's not your thing, please don't read! Ai is out of character, Ai is out of character, Ai is out of character! Important things need to be said three times! People keep leaving comments telling the author that Ai is out of character, and I never know how to respond, so I'm giving you a heads-up here! I'm not exactly thin-skinned, but comments like that still leave me feeling conflicted _(:зゝ∠)_ Theme: