Klaus is an old Martian who has lived on Titan a long time. As a member of the Titan Dockworkers Union, he works as the dockyards' Detective. As the primary gateway into and out of Titan Garden the dockyards see a lot of less-than-lawful dealings going on, and as the dockyard detective Klaus's job isn't to stop those dealings from happening- that is impossible- but rather to limit and contain them. Klaus is a gentle older man who never raises his voice or points an accusing finger. He is very observant and intuitive, however, and will softly imply that he sees something going on that maybe shouldn't ought to be seen, is all.
Klaus doesn't believe in carceral punishment and instead prefers to tell people if he saw them, someone else might see them, and to make sure they don't get caught again. A lot of younger folks and hard-earning workers run through the dockyards and they don't need the complications of dealing with the space brig- Klaus knows this well as he used to work the docks himself. In fact, he still wears his old Titan Dockworkers jacket, its colors faded with age. He maintains a quiet respect with older and younger dockhands alike, as he came up with a lot of the older crew and the younger guys know he always tries to be fair. They all know that when Old Klaus comes snooping around their hand is a bit too clearly in the cookie jar; some of them quit while they're ahead and others just get smarter about their operations.
That kind of quiet and gentle demeanor doesn't mean Klaus is a passive moderator, far from it. He's not out to bust up the little guys but he loves to bag himself a big fish. Saturn is something of a frontier space and every now and then some business interest from another world thinks they can muscle in and have their way with Titan's little hub colony, and it's always a rude awakening when Old Klaus shows up to start asking pointed questions. Titan Garden's got an ecosystem and the people with power who don't respect that tend to find themselves in a whole heap of trouble very far away from home. Baxler is a great example to the contrary, as a very high-profile fence for criminal wares they operate an extremely tight ship and don't tolerate any foolishness from any of their partners for this precise reason. Klaus knows well enough about Baxler's operation and the two share pleasant words quite often, with Klaus letting Baxler know if and when one of their partners is acting out of line, and that's usually enough to nip that problem in the bud. Other business owners have not been so wise as Baxler and Klaus loves to topple their towers of cards.
If Klaus knows about Baxler Distribution Company's operations, he definitely knows about Red Raven and Timberwolf. The one has all these random ships pass through their hangar and tends to be out of the office in the days before Interpol's back channels light up about some big shot's treasures or some corporate secrets going missing, and the other is literally a Baxler Distribution Company partner who doesn't have a hand in the transport of preparation of Baxler's primary business, perishable goods. The key to their success would be the both of them maintaining a nonviolent approach to their illicit side jobs- they don't hit little guys and they don't hurt no one else, so as long as they don't bring heat down on Titan there's no need to douse their flames. Klaus will still keep them honest, however, popping in to poke around and, you know, just see how they're doing. Oh, and, just as an aside, he'd heard from Interpol that while you were out someone lifted a shipment of very important data cartridges from a freightliner and Horizon's executives are furious, so you might want to keep an eye on your own cargo when you're out and about. It's usually enough to put that little bit of pressure on the two salvage companies; rather than throw a perfectly good tow crew in the brig you make sure they keep their cutting edge sharp enough to not make a mess of your station. A couple wolves are good for the ecosystem, after all.