This is the reality

The realm of the air is where the demons are condemned to tempt human souls before they are in turn sent to hell at the Last Judgment. Demons are of course invisible to human senses but the fruits of their actions are shown in the human misery, chaos and sin enveloping the world. Even though both demons and angels are beyond general human sense perception, they still belong to the realm of creation and thus "to this world." Furthermore, these spirits have definite forms and are finite in their movements (any quality of infinity belonging to God alone), so therefore they can be said to have "bodies" in a similar manner to the way humans do, if not physical ones. Fr. Seraphim places special emphasis, citing a great many prominent Orthodox Fathers and spiritual writers, on praying for the dead after because prayers help some souls attain to heaven by calling upon God's mercy with fervor