it's the end. the way solas strokes their hand. the way he begs them to stand down, to let it happen
it's the way he is so, so desperate to not kill them
and, well. most of u probably know my feelings re: the canonicity of supplementary materials (books, comics, etc.), so as with all that supplementary canon i hold this in a kinda... quantum state of true-and-false simultaneously, but... felassan
solas and felassan were so close
so, rook. why does he not kill rook? it would be so easy
but there's an element of this that cannot, in my opinion, be overstated. to disregard its impact is to miss a huge amount of solas' emotional state in this game: rook means so much to solas
rook is his ONLY connection to the outside world for the entire time he's imprisoned. for a game that is about hope in so many ways, rook is notably solas' only hope - and it is a brutal kind of hope, using them, manipulating them. but it is still worth pointing out that, for solas, while he is existing in the regret prison, rook is his symbol of hope
as well as his hope, rook is his only connection to reality, his only reprieve from regret and memory. when rook is not talking to him, he's being drowned in his deepest regrets again and again and again. relentlessly. because he is brutal, when he feels he needs to be. thus, the prison would be brutal, unyielding, and exacting
now, ppl talk about solas in that prison as though it did nothing for him. but i don't think that's true at all. i think it's a factor - one of many - that allows him to set aside his long-standing goals (other crucial factors include: the inquisitor; rook; varric; mythal; and a significant change in circumstances with all the evanuris now dead)
he has always been steeped in his regrets, we know that. but he has also set them aside. whether the murals were a way to bury his regrets, to imbue them in art and apart from himself, to feel them less, is iirc implied but still uncertain, bc dragon age as a series has long been predicated on narrative uncertainty. but either way, he is able to avoid dwelling on his regrets overmuch - whether through ridding himself of them, or through focusing on action, goals, etc.
but in the prison, he cannot avoid them. and upon his escape, i think he does not want another regret. he cannot avoid the weight of them any longer, and they are heavy
he does not want to kill rook, because he does not want to regret killing rook. is this selfish? of course! a part of it IS about him wanting to spare his own feelings. but another part is that he knows that rook is a person, and he's never wanted to kill anybody...
he also does not want to regret tearing down the veil. he does not want to regret the deaths that will follow. he also does not want to cause death: both these things can exist simultaneously
but that is viewing rook in a sort of... abstract, generalized way. while that is an aspect - rook is a person; solas does not want to kill people; ergo, solas does not want to kill rook - it is more important to consider the relationship between solas and rook
solas is suffering in that prison. rook's visits are, would have to be, bright spots amidst that suffering. to me, this is just basic: repeatedly, solas' only relief comes in the form of rook's visits. they're complex in their own way, of course, but it is the only interaction he gets outside of his own worst memories being replayed endlessly
so, in the end, solas is being confronted by the inquisitor, mythal, and rook, all of whom are asking him to stop
confronted by mortality. by immortality
confronted by people he has misled, used, manipulated
and he is seen by them. all of them see him
-a shared moment of understanding; seeing completely, and being wholly seen.
Memory of a Duet (codex)
while the above is about mythal - the codex entry is shown with her tarot card, after all - it also points to a deep desire of solas'. he wants to be seen. to be known. and to be accepted
mythal knows who he was, and much of who he is
the inquisitor knows who he pretended to be, but i think there was significant truth in that pretense: it was who he wanted to be, who he could have been. it was a mask, yes, but not a complete falsehood by any means
and rook knows him from his regrets, from his actions, and from the way others speak about him. knows him from varric's accounts as they traveled together to stop solas. knows him from the inquisitor's accounts. knows what he is willing to do, how far he is willing to go, because he does so with rook
to have these three see him, know him, and accept him...? to have them ask him to stop, to tell him that everything can still be forgiven...?
it must have felt so surreal. i am sure part of his time in the regret prison was each of them calling him a monster. saying they wished they'd never met him. telling him to his face that he ruined everything, ruined them
and i just... i cannot imagine what all is going through his mind. it's little wonder he breaks down
god i just love him so fucking much. but, to speak on the solrook of it all... he does care about rook. i don't think there's any real room for interpretation on that. if he didn't, he'd have killed them. he's killed other people who he cares for (note: i'm not necessarily arguing that he cares more about rook than he did about felassan - i don't want to compare relationships like that - but i think it is fair to say that he has changed since that time)
and rook is the one who has the final choice. the one who can choose to return the dagger to the god of lies. the one who can show such utter vulnerability and, yes, hope, their own hope, their hope for solas, in that final moment
it's hard to imagine him not falling at least a little in love right then. he may not be aware of it at the time, but seriously, that's so profound, that's so formative, that's so shaping. and he has always loved those who shape the world and who shape him