I would be willing to assist, if you require it. I am not entirely certain, but I believe I can perhaps ensure that we will not be noticed - so that if we find him, he will not have a chance to leave before we can report his location. If I can keep things from Heimdall, I should think hiding from Lucifer would be simple enough.
As for the demon, it is unlikely he could do much to me. I doubt he would be able to effectively bind my power quickly enough to prevent escape. Nevertheless, I will make an effort to avoid him if that is what you would prefer.