Anime has no shortage of characters who can do awesome feats, especially in the field of stealth where quick-witted spies and nimble assassins are about. In the realm of action and thriller anime, spies and assassins similar to Yor and Loid Forger of Spy X Family and even Killua Zoldyck and the infamous Zoldyck family of assassins in Hunter X Hunter are popular to strike fast without ever leaving their presence known.