>>98938832It seems very likely canon to me. It makes sense, Kitten get’s tired of just sitting around the Imperial doing nothing, decides to put on his old wargear and go galavanting around the Galaxy looking for a Panacea to the Emperor’s condition, learning about the going-ons of the Galaxy, eventually making his way over to Tau Space during the Confederation Wars, around the time when Shaserra is getting unfrozen.
So he makes a deal to help them with their Ork problem in exchange for a chance to see if they might have something that can help the big E, gets stuck with Shaserra, which he initially hates because Custodes prefer fighting lone wolf and don’t answer to anyone but the Emperor, and has to learn to work with her and her crew as a team. They start off with a rocky relationship, with Kitten only sticking around because they might be his only chance and Shassera putting up with him because of how useful he is, but he eventually gets over himself and develops a respect for her authority and command.
From there things go much more smoothly, with Kitten being much more amiable and helpful, which leads to Shaserra relying on and trusting him more, Kitten becoming an honorary member of her La’rua. The two bond, as Kitten is one of the few people she can talk to who isn’t wrapped around the Ethereals’ finger and she wants to learn more about this strange mercenary, and Shaserra being the first person to treat like a normal-ish human being rather than groveling at his feet or trying to kill him, and they eventually fumble into something resembling a relationship.
Eventually, the War ends and despite not finding what he was looking for, Kitten sticks around afterwards anyways to continue being with her. But since he doesn’t care about the Greater Good or the Ethereals, they push Shadowsun into letting him go, which leads to them Breaking up and Kitten returning home, dejected and heartbroken, and the Ethereals scrubbing his presence from the books.
