merge to the BIG Spirit Guide Topic
It could be that your SG is your brother or has the appearances from your brother. Some people believe that Spirit Guides are dead people. If that’s true your brother can’t be your SG, but he can look the same in your dream. Maybe your brother represents something for you, which has something along with a SG? I don’t know what your brother means to you, but I could imagine that.
It could also be you failed to see your SG and your brother turned up. You could try to meet your SG again and ask him something about it. See if it’s again your brother, or that your brother just appeared for another reason and ask him about that.