If you're playing DoLP it's fairly straightforward; you just buy lockpick sets from Landry. Otherwise, I believe crime-free Skulduggery training caps out at C+ (Forest Lake boxes get you to C, and IIRC the undersea cave locked chests can get you to C+). If you're going that route though I would highly recommend being able to access the smuggler's pub before attempting to grind on locked chests in the area.I'm on "Pervert Angel Virgin + Catgirl" the way.
So, I need a way without Crime Points :') because of my roleplay