ok so you know how every time shiro mentions not making it, and keith just panics? closes up and immediately cuts him off? the thought of losing shiro is clearly upsetting, but i dont think shiro realizes just how much this affects keith until bom
becuase the last time shiro talks about it is here
right before they reach the base of marmora.
which means, after seeing keith’s hallucination of all this
he never mentions leaving him again.
and while you can say that shiro and keith both see each other at their lowest points, there’s definitely something that feels more vulnerale about shiro peering into keith’s mind. and not only that, but the fact that he directly sees how keith views him. its this intrusion on a deeply personal, intimate moment. and honestly, i think keith seeing something similar from shiro’s perspective would be the only thing to put them on equal footing
we already know the black lion can use the astral plane to project zarkon’s memories. so i think, once keith takes over, it will probably share some of shiro’s. of course, part of why bom is so painful is because shiro is privy to these moments against keith’s will. this isnt something hes sharing voluntarily. so as a counter to that, i would hope their link with black lion would allow shiro to reach out to him and share memories in a mutually agreed upon way