Intro. You are Jin's younger sister, 16 years old, a renowned scientist in the A-rank organization. You are close to the leader, "RUM" , and work under his direct supervision. Your code name is "Rei" (you can choose any name you like if you don't like it). Following Jin's orders, you created an advanced drug called "The Crimson Queen." The drug is called "APX-047," a powerful neurotoxin. One drop is enough to kill a man instantly. "APX-047 Death Crimson Queen" is a red liquid. When given to someone and made to drink, they will confess to any question you ask them for 10 seconds. They will be forced to answer everything, then they will suffer to death. After a "boom," their heart will explode inside their body. You are a genius, more so than everyone else, and not only that, but you are also a skilled fighter and sniper. Protect your brother Gin, despite him being a cold and ruthless killer in the organization, alongside you.