Hello,

I would like to do a story about Guardian Angel versus Demons. Is there anyone who would be interested for this?

I think plenty of people would be interested in that concept, but you may attract more players if you flesh out the idea a bit more. What sort of plotline do you envision? What type of setting? Is this going to be on a celestial plane, is it on earth, is it modern times, the future, the past?

You've got an intriguing baseline. Develop it a bit and pitch the details. Good luck!