He is so incompetent at everything else that he can't even take baths alone. It is actually the only thing he is good at. Jyugo from Nanbaka often uses these skills to escape from prison.Sherlock Holmes of Moriarty the Patriot routinely picks almost every lock that inconveniences him, and even makes a joke about not thinking a jail cell was locked.It turns out that years ago he helped out in a huge robbery for Healthcare Motivation reasons, and now he's an Punch Clock Villain fugitive waiting for the Statute of Limitations to kick in. He saves a Sicilian little girl who gets Locked in a Freezer during a hide-and-seek game, and since Lunlun witnesses this she becomes rather interested in what he can do. This is Dario's main skill in Hana no Ko Lunlun.Hiro Amanokawa from Digimon Ghost Game displayed his lockpicking skills a few times.Tooru Amuro from Case Closed is one of these, which is rather odd since Japanese law prohibits possession of any lockpicking tools and carries a penalty of one year imprisonment or a 500,000 yen fine.If they're the only character, their skill with certain doors is likely to just be covering up loading the next room either that, or some doors will be harder or riskier to open than others, but have bigger rewards. If a player character is Master of Unlocking in a game with more than one PC, it's probably to allow them into areas the others can't go. It's also used to avoid Interchangeable Antimatter Keys. Typically, the Master of Unlocking is a plot contrivance to explain why only certain doors can be opened, since only the master can correctly determine which doors are vulnerable to their awe-inspiring skills that, or the developers are trying to make NPCs appear useful without having them actually do anything. You've just witnessed a Master of Unlocking at work. Regardless, once they've worked their magic, the dastardly door lies forever defeated, the way forward clear.
Maybe they pull out some lockpicks, an Improvised Lockpick, a door-opening computerised contraption, or an explosive charge. Maybe they deliver a sharp kick or shoulder barge. But one of the NPCs with you has no such fears their senses have been dulled to the terror before them. Faced with this diabolical machinery, a lesser man will turn and run in terror, their mission forever incomplete. In certain video games, the humble Locked Door is among the most complex devices the Player Character is likely to encounter, requiring years of specialised training to comprehend its intricate workings.