Grup is a Europan resident of Titan Garden and a member of the Titan Dockworkers Union. They are a mid-level security officer tasked with enforcement of regulation and loss prevention and they take their duties very seriously. Grup likes to style themselves after the Europan hunting tradition, regarding crooks, thieves, crimers and ne'er-do-wells as their quarry. They have a small team of security agents under their command and during their shifts they patrol the dockyards diligently on the lookout for crimes in progress they can jump on and thwart. Klaus occasionally has to work with Grup when he is closing the book on a person of interest but will otherwise not involve the Europan in his investigations. Grup has been actively pursuing Mitsuko for a long time but they have thus far been unsuccessful in their efforts.
Europan evo suits come in many shapes and styles, and Grup chooses to use a very large model with thick armor plating and high torque to cut a more intimidating figure. They have outfitted their suit with a large pincer claw capable of being launched great distances using pneumatic pressure and a retractable cord- they saw Amy use her prosthetic's grappling hook once and took the idea for themselves. They call this addition the "crook hook" and will fire it at suspects they chase through the back alleys and side streets of the dockyards and it hurts pretty bad to get pinched by it, but it's within regulation so they're allowed to keep using it. Grup keeps a control device on their belt which allows them to aim and fire their Crook Hook remotely when they are outside their suit.
Red Raven's own Slug knows Grup from when they were young, and they always get a little sour when the security officer comes around. Slug comes from the Europan hunting tradition that includes conservation of the wildlife beneath the moon's thick ice and eating what they hunt. Grup hunts for the sake of hunting, to collect trophies and stories and not as a participant in any greater cycle, so Slug regards Grup as a bully masquerading as something worthy of respect. They're not warmly regarded when they come around Red Raven.
It was Grup's security team who chased down Mitsuko the night she vaulted a fence and fell into the Red Raven nest. After being invited to buzz off by the captain and being informed their quarry was under protection of the doctor, Grup sent their team off to search the rest of the dockyard lane, but they themselves found a back alley, took in a lungful of water, hid their suit and headed back to Red Raven, crawling into their hangar through a vent in the ceiling. They watched the crew take care of Mitsuko, overhearing their warnings about security's watchful eye. There were too many of them for Grup to make a move, but they took in what they could from the rafters and slipped back away into the rainy station night.
Grup couldn't catch Mitsuko in the act that night but they are always keeping a watchful eye out for the Aoba android, and they've put the tow company on their list of quarry as well. They've brought the name Red Raven up with a few of their friends and contacts, and while they could never get any substantial kind of dirt on the crew, there was one person who took an interest in what Grup knew about Red Raven. Or more specifically, their pilot. The Delta android. Someone's got a stake in knowing more about her. Grup didn't have much to share from their first encounter, but now they've got a couple good reasons to keep tabs on the Red Raven office, they're motivated to become a regular nuisance for the whole crew.