About the copilot AU (where Keith is at Kerberos), what has Keith been up to for 11 months following their capture? We can see Shiro fighting in the arena and losing his arm to the Druids but so far it seems that Keith has only been dragged out to watch Shiro fight (which is awful psychologically, but that's it) by Ulaz (isn't he only a doctor though?). Has he been in the arena himself? And we can see his Galra heritage show (eyes, fangs, etc.) but does he know yet? Thank you, and stay safe!
WAAAAAHHH Jesus, it's been so long since I last updated the script so I'll be going on about these from what I recall, love. And these are good questions! I think most of the answers, however, will NOT be explicitly stated on the comic, but some will.
On the first time Keith saw Shiro in the arena, Keith was being brought to the clinic/med bay. My initial plan was for Keith to have some form of physical damage, whether it be broken bone or head wounds, but the plot stays the same whether or not that plan stayed in the script. He was brought to the med bay since the galra for a physical test. The following part won't be stated in the comic, I think (or I could change my mind? Not sure yet), but the galra like to make sure a prisoner is properly separated into the technicians (like Sam was) or gladiators (like Shiro was). Ulaz, even though he's a doctor, was taking him away (on both times) because he was to be brought to the med bay. There are other reasons for this, and though they aren't that climactic, they are spoilers so I won't tell you now ;)
Keith had only gone to the arena a few times (also not stated int he comic), but this was when the galra expected Shiro to die in the first 5 or so games that he played in the arena (not yet Myzax, but leading up to that, and also not at the same time as Matt). Soon, the galra limited the prisoners in line at the arena since Shiro took to long to die and eventually became a rising player.
About the "awful psychology"? I might genuinely add that to the plot, though that would torture my followers ahahahah. It would be interesting if the galra wanted to know how the earthlings' brain works when put under severe emotional distress *evil smile*
Keith is not aware of his galra side yet, but Ulaz has been aware as he has witnessed it multiple times in the sidelines. Ulaz has never told Keith or anyone for that matter.
Do these answer your questions? Please feel free to send another if you want, love :)