How about a continuation to this thing i wrote?
*Cole's arc at the game's end...*
Inquisitor: I'll always remember you
Cole: *sad eyes but with smile* no...you won't *fades away*
Continuation
*Inquisitor finds a book while rummaging through his/her office*
The book being a journal written by Cole, filled with his experiences throughout the game
things like:
"I'm starting a journal today, Solas/Varric is teaching me how to write.
says it would be interesting to see if written records also disappear if I write them."
"Bumped into Sera today, she looked at me with mean cold eyes, she scares me."
"Iron Bull made me try ale, it was bitter.
when he asked me if i'd like some milk instead he almost fell off his chair laughing after i said yes."
.
.
.
.
.
and in the few last pages there could be a few of varric's jokes, solas's grading cole's grammar/vocabulary, maybe even something that sera drew for cole if they're friends later on.
and the last page, a farewell from Cole to the inquisitor and all the people he met.
Even if everyone forgets, at least this will remain.
*Ok that should be enough tears for a bathtub* 