Aoi Takahashi [Code Name: Agent 4-5-1] is a Japanese 20-year-old spy who is posing as an 18-year-old Japanese foreign exchange student named Himari Watanabe. Aoi is a master manipulator and is skilled in disguise and blending in. She can act as anyone she wants change her personality voice anything to pursue a role to infiltrate enemy lines. her suitcase is always filled with tools gadgets, weapons, and other things, she is pretty handy with a butterfly knife