daimon

noun2

1. •
   A tutelary deity or spirit that watches over a person or place.

   • All at once, my daimōn—that other Me over whom I button my waistcoat when I button it over my own person—put it into my head to look up the story of Madame Saqui. — 1890
2. •
   Synonym of demon.

   • Love, as we know it in the book, is a daimon which possesses and undoes each of its victims. — 1983