"admittedly, you put up a greater fight than any enemy I have faced to date. I believe the only reason I won with only as much trouble as I got is because I have more experience than you." Sepulchre says. Though it may not seem like it (it could be construed as something else) he was giving her a greater compliment than he had ever given anyone before. "I would like to propose an alliance. While I cannot guarantee when we will meet, or where, we are bound to meet again in the future. I propose that on such occasions, we work together to accomplish our goals."
(I would like to propose we have this be canon)