very true, demons are very nasty creatures, being since i have a guardian/shikigami i think i can fend one off but idk for how long, never met one and hope i don't, though i do hear whispers so i know what you mean confused_mystery. i hope to one day advance my abilities to be able to fully see them and actually communicate with them. God being a guy its a lot harder to for us to open our mind then a girl and its the truth, im just admitting to it.
I dont think it takes anything special really to communicate with anything. Ive always found theyll respond to just speaking out loud, but making clear what youre speaking to before hand.