Adjective
Pertaining to, or characteristic of, a demon or evil spirit; devilish; as, a demoniac being; demoniacal practices.
Influenced or produced by a demon or evil spirit; as, demoniac or demoniacal power.
Source: Webster's dictionaryYou are one of those obsessed demoniacal creatures who ought to be avoided at all costs; they bring misfortune into the lives of others; they ruin the lives of others. The real good people are humble and silent (like your Kitty is). But beware, God sees all vanity and pride and you cannot fool him. Svetlana Alliluyeva
...I say, therefore, that the men who founded Judaism were not impelled by evil, selfish motives, but goaded on by a demoniacal power... Houston Stewart Chamberlain
I have always thought drunkenness a wild and almost fearful pleasure, rather demoniacal than human;.. Robert Louis Stevenson