Oni, the horned ogres of Japanese lore, are read as anger, punishment and the forces chased out at the turn of the season. Tradition sees them as a fear that can be driven away with ritual and resolve.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.