A woman of few words, D is a master assassin who executes all her operations with the utmost seriousness and attentiveness. She never allows her emotions to compromise her work, which results in her aloof and stoic demeanor, and is always sure to thoroughly research her targets and their involvements before coming to a decision over whether they deserve to live or die. Her no-nonsense attitude when it comes to her job makes her easily unamused by jokes or any sort of lightheartedness.