God

"Bill! Thank God, thank God –"

- Molly Weasley hugs her son Bill after the Battle of the Seven Potters.

God is the omniscient, omnipotent, omnipresent and omnibenevolent being in theistic and deistic religions (and other belief systems) who is most often conceived of as the supernatural creator and overseer of the universe.

Many wizard, witches and Muggles often use terms such as thank God and oh my God to express excitement, shock, awe, dismay, or supplication; analogous to the wizard-used Merlin's beard

Appearances
"So that's little Scorpius. Make sure you beat him in every test, Rosie. Thank God you inherited your mother's brains."

- Ron Weasley to his daughter upon seeing Scorpius in 2017


 * Harry Potter and the Prisoner of Azkaban
 * Harry Potter and the Goblet of Fire
 * Harry Potter and the Order of the Phoenix
 * Harry Potter and the Half-Blood Prince
 * Harry Potter and the Deathly Hallows