Daimon

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

Source: wiktionary

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.

Source: wiktionary

The object which first appears is adopted as the personal mystery, guardian spirit, or tutelary daimon of the entranced, and is never mentioned by him without first making a sacrifice.

Source: wiktionary

Marcus Aurelius is persuaded that God gives every man a special daimon as his guide – a belief which reappears in the Christian guardian angel.

Source: wiktionary