solas/calpernia (solpernia) and why they appeal to me so much:
both are staunchly opposed to slavery, to the point of making it their respective life missions to eradicate it
both are willing to take extreme measures to see the world restored - in solas' case, restoration of the old, connected world; in calpernia's, restoration of tevinter as being a worthy place, one which values all its people
if solas learned about calpernia in detail, i think he would admire her efforts to educate herself even while in active slavery
i don't think calpernia would have strong anti-elf sentiments, given that many slaves in tevinter are elves - i might be wrong about this, she might have internalized bigotry, but i don't think it'd be so pronounced that it'd get in the way of learning to respect solas
calpernia turning against corypheus would show a strength of will that i am convinced solas would admire
solas has a long history of freeing slaves, yes, but also possibly of spending time with them afterwards - maybe not much time or often, but enough to understand some of their difficulties after being liberated
he would admire the network calpernia has built up, and would particularly admire her efforts to free more slaves - and avenge those who are mistreated
both value magic, and i suspect that calpernia would enjoy listening to solas speak on the subject of magic and the fade
solas had ample experience with using militaristic strategies to effect change; i don't think he would overly judge calpernia's use of the venatori as an instrument of change, although he wouldn't approve of it, either
any relationship between them would require that calpernia turn her back on corypheus, and would be aided significantly by calpernia joining the inquisition, either outright or through lending them aid
that kind of change takes courage, and he would admire that
but i think she would need to be the one to pursue him
which i can see her doing, particularly if she does join the inquisition outright, because i can see solas being the one to treat her the most normally