So uh.. I finished ghostrunner 2 recently and.. um... Jack and Rahu, huh?
Listen, I know the game has a relatively open ending. They don't really say if Jack plugged Rahu into the tower or not and just let him be, which is kind of strange on their part since they gave it (at least according to how limited the storytelling is) a lot of nuance. But you could argue that it did happen in the background, it just wasn't important enough to show (which is strange but that's how this game tells its story apparently.) The best example of this is how it shows Bakunin clearly falling to his death and then the guy just appears at the HQ, no questions asked or answered and everyone goes about their day (which is very ???).
So in line with all of this, my own hc is that Rahu is just taking a good nap in the back of Jack's head and they're travelling the outside together :)))
(let me dream okay, I find their dynamic very interesting (and cute))