He stood there for a while, waiting until Requiem was out of sight before a cat's smirk crossed his face. Well. That had gone as well for a first meeting. Riff had Requiem's attention and occasional help and he also had new bits of information to follow up on for later work.
Riff could care little about Requiem's crusade or his lofty goal of killing Nelabasis. Both could prove to be an interesting diversion but Riff knew where he really stood on things. He could say anything and pretend regrets as much as he liked as long as he played according to the current rules in his and Requiem's agreement and lived up to expectations. Until he found the right means to controlling Requiem and his power without the risk of being poison stabbed himself, that is. Riff could keep the 'worst' of himself in check until then.
All in all, as far as Riff was concerned, the night had gone smoothly.