At eighteen years old, Ivy is an expert martial artist and skilled pilot who takes her duties as a detective seriously, being both driven and easily frustrated. In contrast, her fourteen-year-old younger brother Zack approaches his job with easygoing attitude, though he also demonstrates immaturity and impatience towards more traditional non-technological methods; however, his skills include being a polyglot and having a photographic memory, allowing the siblings to complement each other well.